UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D


                    Under the Securities Exchange Act of 1934
                               (Amendment No. 2)*

                               BIOENVISION, INC.
                               -----------------
                                (Name of Issuer)

                    Common Stock, $0.001 Par Value Per Share
                    ----------------------------------------
                         (Title of Class of Securities)

                                   09059N100
                                   ---------
                                 (CUSIP Number)

                                 Keith Tarleton
                   Perseus-Soros BioPharmaceutical Fund, L.P.
                         888 Seventh Avenue, 29th Floor
                               New York, NY 10106
                                 (212) 651-6400
                                 --------------
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                  May 13, 2004
                                  ------------
                      (Date of Event which Requires Filing
                               of this Statement)

If the filing person has previously  filed a statement on Schedule 13G to report
the  acquisition  that is the subject of this  Schedule  13D, and is filing this
schedule because of ss.ss.240.13d-1(e),  240.13d-1(f) or 240.13d-1(g), check the
following box. [ ]

Note:  Schedules  filed in paper format shall include a signed original and five
copies of the  schedule,  including  all exhibits.  See  ss.240.13d-7  for other
parties to whom copies are to be sent.

* The remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for  any  subsequent   amendment   containing   information  which  would  alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).

                          Continued on following pages
                               Page 1 of 70 Pages
                             Exhibit Index: Page 17




                                  SCHEDULE 13D

CUSIP No. 09059N100                                           Page 2 of 70 Pages


1    Names of Reporting Persons
     I.R.S. Identification Nos. of above persons (entities only).

          PERSEUS-SOROS BIOPHARMACEUTICAL FUND, L.P.

2    Check the Appropriate Box if a Member of a Group (See Instructions)
                                           a. [ ]
                                           b. [X]

3    SEC Use Only

4    Source of Funds (See Instructions)

          WC

5    Check if Disclosure of Legal Proceedings Is Required Pursuant to
     Items 2(d) or 2(e)

          [ ]

6    Citizenship or Place of Organization

          Delaware

                7        Sole Voting Power
 Number of                 9,450,053 /1/
  Shares
Beneficially    8       Shared Voting Power
 Owned By                  0
   Each
Reporting       9       Sole Dispositive Power
   Person                  9,450,053 /1/
    With
                10      Shared Dispositive Power
                           0

11   Aggregate Amount Beneficially Owned by Each Reporting Person

                           9,450,053 /1/

12   Check if the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions)
                           [ ]

13   Percent of Class Represented By Amount in Row (11)

                           26.9%

14   Type of Reporting Person (See Instructions)

          PN

-----------------------------------
/1/ Assuming full conversion of the Series A Convertible Participating Preferred
Stock and  including: (A) a Warrant to purchase an aggregate of 3,000,000 shares
of Common Stock; and (B) a Warrant  to  purchase  75,009 shares of Common Stock.
See Item 5 herein.




                                  SCHEDULE 13D

CUSIP No. 09059N100                                           Page 3 of 70 Pages


1    Names of Reporting Persons
     I.R.S. Identification Nos. of above persons (entities only).

                  PERSEUS-SOROS PARTNERS, LLC

2    Check the Appropriate Box if a Member of a Group (See Instructions)
                                           a. [ ]
                                           b. [X]

3    SEC Use Only

4    Source of Funds (See Instructions)

          AF

5    Check if Disclosure of Legal Proceedings Is Required Pursuant to
     Items 2(d) or 2(e)

          [ ]

6    Citizenship or Place of Organization

          Delaware

                7        Sole Voting Power
 Number of                 9,450,053 /1/
  Shares
Beneficially    8       Shared Voting Power
 Owned By                  0
   Each
Reporting       9       Sole Dispositive Power
   Person                  9,450,053 /1/
    With
                10      Shared Dispositive Power
                           0

11   Aggregate Amount Beneficially Owned by Each Reporting Person

                           9,450,053 /1/

12   Check if the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions)
                           [ ]

13   Percent of Class Represented By Amount in Row (11)

                           26.9%

14   Type of Reporting Person (See Instructions)

          OO

-----------------------------------
/1/ Assuming full conversion of the Series A Convertible Participating Preferred
Stock and  including: (A) a Warrant to purchase an aggregate of 3,000,000 shares
of Common Stock; and (B) a Warrant  to  purchase  75,009 shares of Common Stock.
See Item 5 herein.




                                  SCHEDULE 13D

CUSIP No. 09059N100                                           Page 4 of 70 Pages


1    Names of Reporting Persons
     I.R.S. Identification Nos. of above persons (entities only).

                  PERSEUS BIOTECH FUND PARTNERS, LLC

2    Check the Appropriate Box if a Member of a Group (See Instructions)
                                           a. [ ]
                                           b. [X]

3    SEC Use Only

4    Source of Funds (See Instructions)

          AF

5    Check if Disclosure of Legal Proceedings Is Required Pursuant to
     Items 2(d) or 2(e)

          [ ]

6    Citizenship or Place of Organization

          Delaware

                7        Sole Voting Power
 Number of                 0
  Shares
Beneficially    8       Shared Voting Power
 Owned By                  9,450,053 /1/
   Each
Reporting       9       Sole Dispositive Power
   Person                  0
    With
                10      Shared Dispositive Power
                           9,450,053 /1/

11   Aggregate Amount Beneficially Owned by Each Reporting Person

                           9,450,053 /1/

12   Check if the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions)
                           [ ]

13   Percent of Class Represented By Amount in Row (11)

                           26.9%

14   Type of Reporting Person (See Instructions)

          OO

-----------------------------------
/1/ Assuming full conversion of the Series A Convertible Participating Preferred
Stock and  including: (A) a Warrant to purchase an aggregate of 3,000,000 shares
of Common Stock; and (B) a Warrant  to  purchase  75,009 shares of Common Stock.
See Item 5 herein.




                                  SCHEDULE 13D

CUSIP No. 09059N100                                           Page 5 of 70 Pages


1    Names of Reporting Persons
     I.R.S. Identification Nos. of above persons (entities only).

                  SFM PARTICIPATION, LP

2    Check the Appropriate Box if a Member of a Group (See Instructions)
                                           a. [ ]
                                           b. [X]

3    SEC Use Only

4    Source of Funds (See Instructions)

          AF

5    Check if Disclosure of Legal Proceedings Is Required Pursuant to
     Items 2(d) or 2(e)

          [ ]

6    Citizenship or Place of Organization

          Delaware

                7        Sole Voting Power
 Number of                 0
  Shares
Beneficially    8       Shared Voting Power
 Owned By                  9,450,053 /1/
   Each
Reporting       9       Sole Dispositive Power
   Person                  0
    With
                10      Shared Dispositive Power
                           9,450,053 /1/

11   Aggregate Amount Beneficially Owned by Each Reporting Person

                           9,450,053 /1/

12   Check if the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions)
                           [ ]

13   Percent of Class Represented By Amount in Row (11)

                           26.9%

14   Type of Reporting Person (See Instructions)

          PN

-----------------------------------
/1/ Assuming full conversion of the Series A Convertible Participating Preferred
Stock and  including: (A) a Warrant to purchase an aggregate of 3,000,000 shares
of Common Stock; and (B) a Warrant  to  purchase  75,009 shares of Common Stock.
See Item 5 herein.



                                  SCHEDULE 13D

CUSIP No. 09059N100                                           Page 6 of 70 Pages


1    Names of Reporting Persons
     I.R.S. Identification Nos. of above persons (entities only).

                  SFM AH LLC

2    Check the Appropriate Box if a Member of a Group (See Instructions)
                                            a. [ ]
                                            b. [X]

3    SEC Use Only

4    Source of Funds (See Instructions)

          AF

5    Check if Disclosure of Legal Proceedings Is Required Pursuant to
     Items 2(d) or 2(e)

          [ ]

6    Citizenship or Place of Organization

          Delaware

                7        Sole Voting Power
 Number of                 0
  Shares
Beneficially    8       Shared Voting Power
 Owned By                  9,450,053 /1/
   Each
Reporting       9       Sole Dispositive Power
   Person                  0
    With
                10      Shared Dispositive Power
                           9,450,053 /1/

11   Aggregate Amount Beneficially Owned by Each Reporting Person

                           9,450,053 /1/

12   Check if the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions)
                           [ ]

13   Percent of Class Represented By Amount in Row (11)

                           26.9%

14   Type of Reporting Person (See Instructions)

          OO

-----------------------------------
/1/ Assuming full conversion of the Series A Convertible Participating Preferred
Stock and  including: (A) a Warrant to purchase an aggregate of 3,000,000 shares
of Common Stock; and (B) a Warrant  to  purchase  75,009 shares of Common Stock.
See Item 5 herein.



                                  SCHEDULE 13D

CUSIP No. 09059N100                                           Page 7 of 70 Pages


1    Names of Reporting Persons
     I.R.S. Identification Nos. of above persons (entities only).

                  FRANK H. PEARL (in the capacity described herein)

2    Check the Appropriate Box if a Member of a Group (See Instructions)
                                            a. [ ]
                                            b. [X]

3    SEC Use Only

4    Source of Funds (See Instructions)

          AF

5    Check if Disclosure of Legal Proceedings Is Required Pursuant to
     Items 2(d) or 2(e)

          [ ]

6    Citizenship or Place of Organization

          United States

                7        Sole Voting Power
 Number of                 0
  Shares
Beneficially    8       Shared Voting Power
 Owned By                  9,450,053 /1/
   Each
Reporting       9       Sole Dispositive Power
   Person                  0
    With
                10      Shared Dispositive Power
                           9,450,053 /1/

11   Aggregate Amount Beneficially Owned by Each Reporting Person

                           9,450,053 /1/

12   Check if the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions)
                           [ ]

13   Percent of Class Represented By Amount in Row (11)

                           26.9%

14   Type of Reporting Person (See Instructions)

          IA

-----------------------------------
/1/ Assuming full conversion of the Series A Convertible Participating Preferred
Stock and  including: (A) a Warrant to purchase an aggregate of 3,000,000 shares
of Common Stock; and (B) a Warrant  to  purchase  75,009 shares of Common Stock.
See Item 5 herein.




                                  SCHEDULE 13D

CUSIP No. 09059N100                                           Page 8 of 70 Pages


1    Names of Reporting Persons
     I.R.S. Identification Nos. of above persons (entities only).

                  GEORGE SOROS (in the capacity described herein)

2    Check the Appropriate Box if a Member of a Group (See Instructions)
                                            a. [ ]
                                            b. [X]

3    SEC Use Only

4    Source of Funds (See Instructions)

          AF

5    Check if Disclosure of Legal Proceedings Is Required Pursuant to
     Items 2(d) or 2(e)

          [ ]

6    Citizenship or Place of Organization

          United States

                7        Sole Voting Power
 Number of                 0
  Shares
Beneficially    8       Shared Voting Power
 Owned By                  9,450,053 /1/
   Each
Reporting       9       Sole Dispositive Power
   Person                  0
    With
                10      Shared Dispositive Power
                           9,450,053 /1/

11   Aggregate Amount Beneficially Owned by Each Reporting Person

                           9,450,053 /1/

12   Check if the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions)
                           [ ]

13   Percent of Class Represented By Amount in Row (11)

                           26.9%

14   Type of Reporting Person (See Instructions)

          IA

-----------------------------------
/1/ Assuming full conversion of the Series A Convertible Participating Preferred
Stock and  including: (A) a Warrant to purchase an aggregate of 3,000,000 shares
of Common Stock; and (B) a Warrant  to  purchase  75,009 shares of Common Stock.
See Item 5 herein.



                                  SCHEDULE 13D

CUSIP No. 09059N100                                           Page 9 of 70 Pages


1    Names of Reporting Persons
     I.R.S. Identification Nos. of above persons (entities only).

                  SOROS FUND MANAGEMENT LLC

2    Check the Appropriate Box if a Member of a Group (See Instructions)
                                            a. [ ]
                                            b. [X]

3    SEC Use Only

4    Source of Funds (See Instructions)

          AF

5    Check if Disclosure of Legal Proceedings Is Required Pursuant to
     Items 2(d) or 2(e)

          [ ]

6    Citizenship or Place of Organization

          Delaware

                7        Sole Voting Power
 Number of                 0
  Shares
Beneficially    8       Shared Voting Power
 Owned By                  9,450,053 /1/
   Each
Reporting       9       Sole Dispositive Power
   Person                  0
    With
                10      Shared Dispositive Power
                           9,450,053 /1/

11   Aggregate Amount Beneficially Owned by Each Reporting Person

                           9,450,053 /1/

12   Check if the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions)
                           [ ]

13   Percent of Class Represented By Amount in Row (11)

                           26.9%

14   Type of Reporting Person (See Instructions)

          OO; IA

-----------------------------------
/1/ Assuming full conversion of the Series A Convertible Participating Preferred
Stock and  including: (A) a Warrant to purchase an aggregate of 3,000,000 shares
of Common Stock; and (B) a Warrant  to  purchase  75,009 shares of Common Stock.
See Item 5 herein.




                                  SCHEDULE 13D

CUSIP No. 09059N100                                          Page 10 of 70 Pages


1    Names of Reporting Persons
     I.R.S. Identification Nos. of above persons (entities only).

                  PERSEUS EC, LLC

2    Check the Appropriate Box if a Member of a Group (See Instructions)
                                            a. [ ]
                                            b. [X]

3    SEC Use Only

4    Source of Funds (See Instructions)

          AF

5    Check if Disclosure of Legal Proceedings Is Required Pursuant to
     Items 2(d) or 2(e)

          [ ]

6    Citizenship or Place of Organization

          Delaware

                7        Sole Voting Power
 Number of                 0
  Shares
Beneficially    8       Shared Voting Power
 Owned By                  9,450,053 /1/
   Each
Reporting       9       Sole Dispositive Power
   Person                  0
    With
                10      Shared Dispositive Power
                           9,450,053 /1/

11   Aggregate Amount Beneficially Owned by Each Reporting Person

                           9,450,053 /1/

12   Check if the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions)
                           [ ]

13   Percent of Class Represented By Amount in Row (11)

                           26.9%

14   Type of Reporting Person (See Instructions)

          OO

-----------------------------------
/1/ Assuming full conversion of the Series A Convertible Participating Preferred
Stock and  including: (A) a Warrant to purchase an aggregate of 3,000,000 shares
of Common Stock; and (B) a Warrant  to  purchase  75,009 shares of Common Stock.
See Item 5 herein.




                                  SCHEDULE 13D

CUSIP No. 09059N100                                          Page 11 of 70 Pages


1    Names of Reporting Persons
     I.R.S. Identification Nos. of above persons (entities only).

                  PERSEUSPUR, LLC

2    Check the Appropriate Box if a Member of a Group (See Instructions)
                                            a. [ ]
                                            b. [X]

3    SEC Use Only

4    Source of Funds (See Instructions)

          AF

5    Check if Disclosure of Legal Proceedings Is Required Pursuant to
     Items 2(d) or 2(e)

          [ ]

6    Citizenship or Place of Organization

          Delaware

                7        Sole Voting Power
 Number of                 0
  Shares
Beneficially    8       Shared Voting Power
 Owned By                  9,450,053 /1/
   Each
Reporting       9       Sole Dispositive Power
   Person                  0
    With
                10      Shared Dispositive Power
                           9,450,053 /1/

11   Aggregate Amount Beneficially Owned by Each Reporting Person

                           9,450,053 /1/

12   Check if the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions)
                           [ ]

13   Percent of Class Represented By Amount in Row (11)

                           26.9%

14   Type of Reporting Person (See Instructions)

          OO

-----------------------------------
/1/ Assuming full conversion of the Series A Convertible Participating Preferred
Stock and  including: (A) a Warrant to purchase an aggregate of 3,000,000 shares
of Common Stock; and (B) a Warrant  to  purchase  75,009 shares of Common Stock.
See Item 5 herein.



                                                             Page 12 of 70 Pages

               This Amendment No. 2 to Schedule 13D relates to the Common Stock,
$0.001 par value per share (the  "Shares"),  of  Bioenvision,  Inc.,  a Delaware
corporation  (the  "Issuer").  This  Amendment No. 2  supplementally  amends the
initial  statement on Schedule  13D,  dated May 20, 2002,  and  Amendment  No. 1
thereto, dated January 8, 2003 (together, the "Initial Statement"), filed by the
Reporting  Persons (as defined  herein).  This Amendment No. 2 is being filed by
the Reporting Persons to report the number of Shares which the Reporting Persons
may be deemed to beneficially  own has decreased by more than one percent of the
current amount of  outstanding  Shares.  Capitalized  terms used but not defined
herein shall have the meanings  ascribed to them in the Initial  Statement.  The
Initial Statement is supplementally amended as follows.

Item 2.        Identity and Background

               This  Statement is being filed on behalf of each of the following
persons (collectively, the "Reporting Persons"):

               (i) Perseus-Soros  BioPharmaceutical Fund, LP, a Delaware limited
partnership (the "Purchaser");

               (ii)  Perseus-Soros  Partners,  LLC, a Delaware limited liability
company ("Perseus-Soros Partners");

               (iii)  Perseus  BioTech Fund  Partners,  LLC, a Delaware  limited
liability company ("Perseus Partners");

               (iv) SFM  Participation,  LP, a Delaware limied partnership ("SFM
Participation");

               (v) SFM AH LLC, a Delaware limited liability company ("SFM AH");

               (vi) Mr. Frank H. Pearl ("Mr. Pearl");

               (vii) Mr. George Soros ("Mr. Soros");

               (viii) Soros Fund  Management LLC, a Delaware  limited  liability
company ("SFM LLC");

               (ix) Perseus EC, LLC ("Perseus EC"); a Delaware limited liability
company; and

               (x)  Perseuspur,   LLC,  a  Delaware  limited  liability  company
("Perseuspur").

               This Statement relates to the Shares held for the accounts of the
Purchaser.

Item 3.        Source and Amount of Funds or Other Consideration

               The information set forth in Item 6 hereof is hereby incorporated
by reference into this Item 3.

               The Purchaser expended approximately $2,344,025.00 of its working
capital to purchase the securities reported herein as being acquired since March
18,  2004  (60  days  prior  to  the  date  hereof).  This  number  consists  of
approximately  $2,344,025.00  to purchase  375,044 Shares and warrants (the "May
Warrants") to purchase  75,009  Shares  pursuant to the Common Stock and Warrant
Purchase  Agreement,  dated  as  of May 13, 2004 (the "Common  Stock and Warrant
Purchase Agreement").


                                                             Page 13 of 70 Pages

Item 5.        Interest in Securities of the Issuer

               According to information  provided by the Issuer to the Reporting
Persons, 26,002,829 Shares were outstanding as of May 14, 2004.

               (a) Each of the  Reporting  Persons may be deemed the  beneficial
owner  of  the   9,450,053   Shares  held  for  the  account  of  the  Purchaser
(approximately  26.9% of the total  number of Shares  outstanding  assuming  the
exercise and  conversion  of all of the  securities  held for the account of the
Purchaser).  This number  consists of A) 375,044  Shares held for the account of
the  Purchaser,  B) 6,000,000  Shares  issuable upon the conversion of 3,000,000
Shares of the  Issuer's  Series A  Convertible  Participating  Preferred  Stock,
$0.001 par value per share (the "Series A Preferred Stock") held for the account
of the Purchaser,  C) 3,000,000  Shares  issuable upon the exercise of a warrant
held for the account of the  Purchaser,  and D) 75,009 Shares  issuable upon the
exercise of the May Warrants held for the account of the Purchaser.

               (b) (i) Each of the Purchaser and  Perseus-Soros  Partners may be
deemed to have the sole  power to  direct  the  voting  and  disposition  of the
9,450,053 Shares  beneficially  owned by the Purchaser assuming the exercise and
conversion of all of the securities held for the account of the Purchaser.

                   (ii) Each of Perseus  Partners,  SFM  Participation,  SFM AH,
Mr.  Pearl,  Mr.  Soros,  SFM LLC,  Perseus EC and  Perseuspur  may be deemed to
have  shared  power to  direct  the  voting  and  disposition  of the  9,450,053
Shares beneficially  owned by the Purchaser assuming the exercise and conversion
of all of the securities held for the account of the Purchaser.

               (c) Except for the transactions  set forth in Item 6 herein,  all
of which were effected in private  transactions with the Issuer, there have been
no  transactions  effected  with  respect to the Shares since March 18, 2004 (60
days prior to the date hereof) by any of the Reporting Persons.

               (d) The partners of the Purchaser have  the  right to participate
in the receipt of dividends from, or proceeds from the sales of, the Shares held
for the account of the Purchaser in accordance with their ownership interests in
the Purchaser.

               (e) Not applicable.

Item 6.        Contracts,  Arrangements,  Understandings  or  Relationships with
               Respect to Securities of the Issuer.

Common Stock and Warrant Purchase Agreement
-------------------------------------------

               On May 13,  2004,  the Issuer  entered  into the Common Stock and
Warrant Purchase Agreement (a copy of the form of such agreement is incorporated
by  reference  hereto as Exhibit 9 and is  incorporated  herein by  reference in
response  to this  Item 6) with  certain  investors,  including  the  Purchaser.
Pursuant to the terms of the Common Stock and Warrant  Purchase  Agreement,  the
Purchaser   purchased  375,044  Shares  for  an  aggregate   purchase  price  of
approximately  $2,344,025.00.  Also  pursuant  to the Common  Stock and  Warrant
Purchase Agreement, the Purchaser received the May Warrants at a rate of one May
Warrant  for every five  Shares  purchased  under the Common  Stock and  Warrant
Purchase Agreement. As a result, the Purchaser received May Warrants to purchase
75,009  Shares.  A copy of the  form  of the  May  Warrant  is  incorporated  by
reference  hereto as  Exhibit  10 and is  incorporated  herein by  reference  in
response to this Item 6.



                                                             Page 14 of 70 Pages

               The  foregoing  descriptions  of the  Common  Stock  and  Warrant
Purchase  Agreement  and the May Warrant  does not purport to be complete and is
qualified in its entirety by the terms of such  document  which is  incorporated
herein by reference in response to this Item 6.

Registration Rights Agreement
-----------------------------

               On May 13, 2004, the Issuer  entered into a  Registration  Rights
Agreement  (the  "Registration  Rights  Agreement")  (a copy of the form of such
agreement is incorporated by reference  hereto as Exhibit 11 and is incorporated
herein by reference in response to this Item 6) with the investors  that entered
into the Common Stock and Warrant Purchase  Agreement,  including the Purchaser.
Pursuant to the Registration  Rights Agreement,  among other things,  the Issuer
agreed  to  prepare  and  file  with  the  SEC  a  registration  statement  (the
"Registration  Statement")  no later than 30 days  following  the closing of the
transactions  contemplated in the Common Stock and Warrant  Purchase  Agreement.
The Registration Statement would cover the resale of all Shares and the warrants
to purchase Shares issued and issuable  pursuant to the Common Stock and Warrant
Purchase Agreement.

               The foregoing  description of the  Registration  Rights Agreement
does not purport to be complete and is qualified in its entirety by the terms of
the Registration Rights Agreement,  which is incorporated herein by reference in
response to this Item 6.

               Except as set forth herein, the Reporting Persons do not have any
contracts,  arrangements,  understandings  or relationships  with respect to any
securities of the Issuer.

Item 7.        Material to be Filed as Exhibits

               The Exhibit Index is incorporated herein by reference.



                                                             Page 15 of 70 Pages


                                   SIGNATURES

         After reasonable inquiry and to the best of my knowledge and belief,
the undersigned certifies that the information set forth in this Statement is
true, complete and correct.


Date: May 17, 2004               PERSEUS-SOROS BIOPHARMACEUTICAL FUND, LP

                                 By:      Perseus-Soros Partners, LLC
                                          General Partner

                                 By:      SFM Participation, L.P.,
                                          Managing Member

                                 By:      SFM AH LLC
                                          General Partner

                                 By:      Soros Fund Management LLC
                                          Managing Member

                                 By:      /s/ Jodye Anzalotta
                                          -------------------------
                                          Name:  Jodye Anzalotta
                                          Title: Assistant General Counsel


                                 PERSEUS-SOROS PARTNERS, LLC

                                 By:      SFM Participation, L.P.,
                                          Managing Member

                                 By:      SFM AH LLC
                                          General Partner

                                 By:      Soros Fund Management LLC
                                          Managing Member

                                 By:      /s/ Jodye Anzalotta
                                          -------------------------
                                          Name:  Jodye Anzalotta
                                          Title: Assistant General Counsel


                                 PERSEUS BIOTECH FUND PARTNERS, LLC

                                 By:      Perseuspur EC, L.L.C.
                                          Managing Member

                                 By:      Perseuspur, LLC
                                          Member

                                 By:      /s/ Rodd Macklin
                                          -------------------------
                                          Name:  Rodd Macklin
                                          Title: Secretary and Treasurer



                                                             Page 16 of 70 Pages

                                 PERSEUS EC, L.L.C.

                                 By:      Perseuspur, LLC
                                          Member

                                 By:      /s/ Rodd Macklin
                                          -------------------------
                                          Name:  Rodd Macklin
                                          Title: Secretary and Treasurer

                                 PERSEUSPUR, LLC

                                 By:      /s/ Rodd Macklin
                                          -------------------------
                                          Name:  Rodd Macklin
                                          Title: Secretary and Treasurer

                                 FRANK H. PEARL

                                 By:      /s/ Rodd Macklin
                                          -------------------------
                                          Name:  Rodd Macklin
                                          Title: Attorney-in-Fact

                                 SFM PARTICIPATION, L.P.

                                 By:      SFM AH LLC
                                          General Partner

                                 By:      Soros Fund Management LLC
                                          Managing Member

                                 By:      /s/ Jodye Anzalotta
                                          -------------------------
                                          Name:  Jodye Anzalotta
                                          Title: Assistant General Counsel

                                 SFM AH LLC

                                 By:      Soros Fund Management LLC
                                          Managing Member

                                 By:      /s/ Jodye Anzalotta
                                          -------------------------
                                          Name:  Jodye Anzalotta
                                          Title: Assistant General Counsel

                                 GEORGE SOROS

                                 By:      /s/ Jodye Anzalotta
                                          -------------------------
                                          Name:  Jodye Anzalotta
                                          Title: Attorney-in-Fact

                                 SOROS FUND MANAGEMENT LLC

                                 By:      /s/ Jodye Anzalotta
                                          -------------------------
                                          Name:  Jodye Anzalotta
                                          Title: Assistant General Counsel



                                                             Page 17 of 70 Pages


                                  EXHIBIT INDEX



Exhibit                                                                Page No.
-------                                                                --------

9.   Form of the Common Stock and Warrant Purchase Agreement,
     by  and  among  Bioenvision,  Inc. and certain Investors
     set forth therein............................................       18

10.  Form of the  Warrant  to  Purchase  Shares  of  Bioenvision,
     Inc..........................................................       41

11.  Form of the Registration  Rights  Agreement,  by  and  among
     Bioenvision,  Inc.  and  the  Investors  named in the Common
     Stock and Warrant Purchase Agreement.........................       52





                                                             Page 18 of 70 Pages

                                    EXHIBIT 9
                                    ---------

                   COMMON STOCK AND WARRANT PURCHASE AGREEMENT

               THIS COMMON STOCK AND WARRANT PURCHASE AGREEMENT ("Agreement") is
made as of this  __th  day of May,  2004,  by and  among  Bioenvision,  Inc.,  a
Delaware corporation (the "Company"),  and the Investors set forth on Schedule I
affixed hereto,  as such Schedule may be amended from time to time in accordance
with the  terms of this  Agreement  (each an  "Investor"  and  collectively  the
"Investors").

                                    Recitals:

               A. The Company desires to raise up to  approximately  $16,250,000
through the issuance  and sale of up to  approximately  2,600,000  shares of the
Company's common stock, par value $0.001 per share (the "Common Stock"),  to the
Investors at a per share  purchase  price of $6.25,  together  with a warrant to
acquire  one-fifth of a share of Common Stock, at an exercise price of $7.50, in
the form of  Exhibit A annexed  hereto  and made a part  hereof  (the  "Investor
Warrants"),  for each share of Common Stock purchased by the Investors  pursuant
to this Agreement (the "Private Placement"); and

               B. The  Investors  wish to  purchase  from the  Company,  and the
Company wishes to sell and issue to the Investors, upon the terms and conditions
stated in this Agreement, such number of shares of the Company's Common Stock as
is set forth next to each such Investor's name on Schedule I affixed hereto; and

               C. The Company has agreed that, upon consummation of the purchase
of the Common Stock,  the Company will issue to each Investor,  or its designee,
Investor  Warrants to purchase  such  number of shares of the  Company's  Common
Stock as is set forth next to each such  Investor's  name on  Schedule I affixed
hereto; and

               D. The Company has engaged SCO  Securities  LLC as its  placement
agent (the  "Placement  Agent") for the Private  Placement  on a "best  efforts"
basis; and

               E. Contemporaneous with the sale of the Common Stock, the parties
hereto will enter into a  Registration  Rights  Agreement,  in the form attached
hereto as Exhibit B (the "Registration  Rights  Agreement"),  pursuant to which,
among other  things,  the  Company  will agree to provide  certain  registration
rights  under  the  Securities  Act of  1933,  as  amended,  and the  rules  and
regulations  promulgated  thereunder,  and applicable state securities laws (the
"1933 Act"); and

               F. The Company and the Investors  are  executing  and  delivering
this  Agreement in reliance  upon the  exemption  from  securities  registration
afforded by the provisions of Regulation D  ("Regulation  D"), as promulgated by
the U.S.  Securities and Exchange  Commission (the "SEC") under the 1933 Act, as
amended, and Section 4(2) under the 1933 Act.

               NOW,  THEREFORE,  in consideration of these premises,  the mutual
promises made herein and for other good and valuable consideration,  the receipt
and  sufficiency  of which is hereby  acknowledged,  the parties hereto agree as
follows:

     1.  Definitions.  In addition to those terms defined above and elsewhere in
this Agreement,  for the purposes of this  Agreement,  the following terms shall
have the meanings set forth in this Section 1:

                                                             Page 19 of 70 Pages


          "Affiliate"  means, with respect to any Person, any other Person which
directly or indirectly  Controls,  is Controlled  by, or is under common Control
with, such Person.

          "Business Day" means a day, other than a Saturday or Sunday,  on which
banks in New York City are open for the general transaction of business.

          "Common  Stock" has the  meaning set forth in the  Recitals,  and also
includes any securities into which the Common Stock may be reclassified.

          "Common Stock  Equivalents" means any securities of the Company or the
Subsidiaries  which  would  entitle  the  holder  thereof to acquire at any time
Common Stock,  including without limitation,  any debt, preferred stock, rights,
options,  warrants or other  instrument that is at any time  convertible into or
exchangeable  for, or otherwise  entitles the holder thereof to receive,  Common
Stock.

          "Company's   Knowledge"  means  the  actual  knowledge  of  the  Chief
Executive Officer and the Chief Financial Officer of the Company.

          "Confidential   Information"   means   trade   secrets,   confidential
information  and  know-how  (including  but  not  limited  to  ideas,  formulae,
compositions,  processes,  procedures and  techniques,  research and development
information,   computer  program  code,  performance   specifications,   support
documentation, drawings, specifications,  designs, business and marketing plans,
and customer and supplier lists and related information).

          "Control"  means the possession,  direct or indirect,  of the power to
direct  or cause the  direction  of the  management  and  policies  of a Person,
whether through the ownership of voting securities, by contract or otherwise.

          "Intellectual  Property"  means  all of the  following:  (i)  patents,
patent   applications,   patent  disclosures  and  inventions  (whether  or  not
patentable  and whether or not reduced to practice);  (ii)  trademarks,  service
marks, trade dress, trade names,  corporate names,  logos,  slogans and Internet
domain names,  together with all goodwill associated with each of the foregoing;
(iii) copyrights and copyrightable  works; (iv) registrations,  applications and
renewals for any of the foregoing;  (v) trade secrets,  Confidential Information
and know-how  (including,  but not limited to,  ideas,  formulae,  compositions,
manufacturing and production processes and techniques,  research and development
information,  drawings,  specifications,  designs, business and marketing plans,
and customer  and supplier  lists and related  information);  and (vi)  computer
software (including, but not limited to, data, data bases and documentation).

          "Material  Adverse Effect" means a material  adverse effect on (i) the
assets, liabilities,  results of operations,  condition (financial or otherwise)
or  business  of the Company  and its  Subsidiaries  taken as a whole,  (ii) the
ability of the Company to issue and sell the securities  contemplated  hereby or
to  perform  on a timely  basis its  obligations  under  any of the  Transaction
Documents,  or (iii) a material  adverse  effect on the  legality,  validity  or
enforceability of any Transaction Document.

          "Material   Contract"  means  any  contract  of  the  Company  or  any
Subsidiary  that was or should  have been filed as an exhibit to the SEC Filings
pursuant to Item 601(b)(4) or Item 601(b)(10) of Regulation S-K.

          "Person"  means  an  individual,  corporation,   partnership,  limited
liability  company,  trust,  business trust,  association,  joint stock company,
joint venture, sole proprietorship,  unincorporated  organization,  governmental
authority or any other form of entity not specifically listed herein.


                                                             Page 20 of 70 Pages

          "Placement Agent Agreement" means that certain Agreement,  dated as of
November 16, 2001, by and between the Company and the Placement Agent.

          "SEC Filings" has the meaning set forth in Section 4.6.

          "Securities" means the Shares, the Warrants and the Warrant Shares.

          "Shares"  means the  shares of Common  Stock  being  purchased  by the
Investors hereunder.

          "Subsidiary" has the meaning set forth in Section 4.1.

          "Trading Market" means the following markets or exchanges on which the
Common  Stock is listed or  quoted  for  trading  on the date in  question:  the
American Stock Exchange, the New York Stock Exchange, the Nasdaq National Market
or the Nasdaq SmallCap Market.

          "Transaction  Documents"  means  this  Agreement,  the  Warrants,  the
Registration Rights Agreement, and any other documents or agreements executed in
connection with the transactions contemplated hereunder.

          "Warrants"  means  the  Investor  Warrants  and  the  Placement  Agent
Warrants (as defined in Section 4.20).

          "Warrant  Shares"  means  the  shares of Common  Stock  issuable  upon
exercise of the Warrants and the Placement Agent Warrants.

          "1934 Act" means the Securities Exchange Act of 1934, as
amended, and the rules and regulations promulgated thereunder.

     2. Purchase and Sale of the Shares.  Subject to the terms and conditions of
this Agreement,  at the Closing (as defined in Section 3), the Investors  listed
on Schedule I attached hereto, which Schedule I may be amended from time to time
to add  additional  Investors who agree to purchase  Common Stock in the Private
Placement by  executing a  counterpart  to this  Agreement as of the date hereof
(collectively, the "Investors"), shall severally, and not jointly, purchase, and
the Company shall sell and issue to the Investors,  the Shares in the respective
amounts set forth opposite their names on Schedule I affixed hereto, in exchange
for the cash consideration set forth opposite their respective names on Schedule
I affixed hereto.  Also at the Closing,  the Company shall issue the Warrants to
the  Investors,  or their  respective  designees,  in such  amounts as set forth
opposite their respective names on Schedule I affixed hereto.

     3. Closing.  On the day of the Closing ("Closing Date"),  the Company shall
issue to each Investor a certificate or certificates, registered in such name or
names as each such Investor may designate,  representing the number of shares of
Common Stock as is set forth opposite such Investor's name on Schedule I affixed
hereto,  and Company shall also issue to each such Investor,  or such Investor's
respective  designees,  the number of Investor Warrants as is set forth opposite
such Investor's name on Schedule I affixed hereto (the "Closing").  The purchase
and sale of the Shares and the issuance of the Investor  Warrants in the Closing
shall take place at such location as the Company and the  Placement  Agent shall
mutually agree.


                                                             Page 21 of 70 Pages

     4.  Representations  and  Warranties  of the  Company.  The Company  hereby
represents  and warrants to the Investors  and the Placement  Agent on and as of
the  Closing  Date,  that,  except  as set  forth  in the  disclosure  schedules
concurrently delivered herewith (collectively, the "Disclosure Schedules"):

          4.1.  Organization,  Good  Standing  and  Qualification.  Each  of the
Company and its Subsidiaries,  a complete list of which is set forth in Schedule
4.1  of  the  Disclosure  Schedules  ("Subsidiaries"),  is  a  corporation  duly
organized,  validly  existing  and  in  good  standing  under  the  laws  of the
jurisdiction  of its  incorporation  and has all requisite  corporate  power and
authority to carry on its business as now conducted  and to own its  properties.
Each of the Company and its  Subsidiaries  is duly qualified to do business as a
foreign  corporation  and is in good standing in each  jurisdiction in which the
conduct of its business or its  ownership or its leasing of property  makes such
qualification or licensing necessary, unless the failure to so qualify would not
have a Material Adverse Effect.

          4.2. Authorization.  The Company has all requisite corporate power and
authority  and has taken all  requisite  action on the part of the Company,  its
officers,  directors  and  stockholders  necessary  for (i)  the  authorization,
execution and delivery of the Transaction  Documents,  (ii) authorization of the
performance of all  obligations of the Company under this Agreement or the other
Transaction Documents, and (iii) the authorization, issuance (or reservation for
issuance) and delivery of the Securities.  The  Transaction  Documents have been
duly executed and delivered by the Company and constitute  the legal,  valid and
binding  obligations  of  the  Company,   enforceable  against  the  Company  in
accordance  with their  respective  terms,  subject to  bankruptcy,  insolvency,
fraudulent  transfer,  reorganization,  moratorium  and similar  laws of general
applicability, relating to or affecting creditors' rights generally.

          4.3. Capitalization.

          (a)  Schedule  4.3 of the  Disclosure  Schedules  sets  forth  (i) the
authorized capital stock of the Company as of February 23, 2004, (ii) the number
of shares of each  class of capital  stock  issued  and  outstanding,  (iii) the
number of shares of capital  stock  issuable  pursuant  to the  Company's  stock
option  plans,  and (iv) the number of shares of capital stock  issuable  and/or
reserved  for  issuance  pursuant  to  securities  (other  than the  Securities)
exercisable  for, or convertible  into or exchangeable for any shares of capital
stock of the Company.  All of the issued and outstanding shares of the Company's
capital stock have been duly  authorized  and validly issued and are fully paid,
nonassessable and free of pre-emptive  rights and were issued in full compliance
with  applicable  law and any  rights of third  parties.  All of the  issued and
outstanding shares of capital stock of each Subsidiary are owned by the Company,
beneficially  and  of  record.  Except  as  described  on  Schedule  4.3  of the
Disclosure Schedules or in the SEC Filings,  there are no outstanding  warrants,
options,  convertible securities or other rights,  agreements or arrangements of
any character  under which the Company or any  Subsidiary is or may be obligated
to issue any equity  securities of any kind and,  except as contemplated by this
Agreement,  neither the Company nor any Subsidiary is currently in  negotiations
for the issuance of any equity  securities  of any kind.  Except as described on
Schedule 4.3 of the Disclosure  Schedules or in the SEC Filings,  and except for
the Registration  Rights  Agreement,  there are no voting  agreements,  buy-sell
agreements,  option or right of first purchase agreements or other agreements of
any kind  among the  Company  and any of the  security  holders  of the  Company
relating to the  securities of the Company.  Except as described on Schedule 4.3
of the Disclosure  Schedules or in the SEC Filings,  the Company has not granted
any Person the right to require the Company to register  any  securities  of the
Company under the 1933 Act,  whether on a demand basis or in connection with the
registration of securities of the Company for its own account or for the account
of any other Person.  No  securities  issued by the Company from the date of its
incorporation  to the date hereof were issued in violation  of any  statutory or
common law preemptive rights.  There are no dividends which have accrued or been
declared but are unpaid on the capital stock of the Company.  All taxes required

                                                             Page 22 of 70 Pages

to be paid by the Company in  connection  with the issuance and any transfers of
the Company's  capital stock have been paid.  All securities of the Company have
been issued in all material  respects in accordance  with the  provisions of all
applicable securities and other laws. Except as set forth on Schedule 4.3 of the
Disclosure  Schedules,  no  Person  has any right of first  refusal,  preemptive
right,  right of  participation,  or any  similar  right to  participate  in the
transactions  contemplated by the Transaction  Documents.  The issue and sale of
the Securities  will not obligate the Company to issue shares of Common Stock or
other securities to any Person (other than the Investors) and will not result in
a right of any holder of Company securities to adjust the exercise,  conversion,
exchange or reset price under such securities.

          Except as set forth on Schedule 4.3 of the Disclosure  Schedules or in
the SEC Filings,  the Company  does not have  outstanding  shareholder  purchase
rights or any  similar  arrangement  in effect  giving  any  Person the right to
purchase  any equity  interest in the  Company  upon the  occurrence  of certain
events.

          4.4. Valid Issuance.  The Shares have been duly and validly authorized
and,  when  issued  and paid for  pursuant  to this  Agreement,  will be validly
issued,  fully  paid and  nonassessable,  and  shall  be free  and  clear of all
encumbrances and restrictions,  except for restrictions on transfer set forth in
the Transaction Documents or imposed by applicable securities laws. The Warrants
have been duly and validly authorized.  Upon the due exercise of the Warrants in
accordance  with the terms thereof,  the Warrant Shares will be validly  issued,
fully  paid  and  non-assessable,   free  and  clear  of  all  encumbrances  and
restrictions,  except for  restrictions on transfer set forth in the Transaction
Documents or imposed by applicable  securities  laws. The Company has reserved a
sufficient  number of shares of Common Stock for  issuance  upon the exercise of
the Warrants,  free and clear of all encumbrances and  restrictions,  except for
restrictions  on transfer set forth in the  Transaction  Documents or imposed by
applicable securities laws.

          4.5.  Consents.  Except as set forth on Schedule 4.5 of the Disclosure
Schedules,   the  Company  is  not  required  to  obtain  any  consent,  waiver,
authorization  or  order  of,  give  any  notice  to,  or  make  any  filing  or
registration   with,  any  court  or  other  federal,   state,  local  or  other
governmental  authority  or other  Person  in  connection  with  the  execution,
delivery and performance by the Company of the Transaction Documents, other than
(a) the filing with the SEC of the Registration Statement, the application(s) to
each Trading Market for the listing of the Shares and Warrant Shares for trading
thereon in the time and manner required thereby,  Form D and applicable Blue Sky
filings and (b) such as have already been obtained or such exemptive  filings as
are required to be made under applicable securities laws.

          4.6.  Delivery  of SEC  Filings.  The  Company  has  provided  or made
available to the Investors  copies of the Company's most recent Annual Report on
Form 10-KSB for the fiscal year ended June 30, 2003 (the "10-K"),  the Company's
quarterly  report on Form 10-QSB for the three month period  ended  December 31,
2003, the Company's  Proxy Statement on Schedule 14 filed December 15, 2003, and
all other reports or other documents  filed by the Company  pursuant to the 1933
Act and 1934 Act for the 12 months preceding the date hereof (collectively,  the
"SEC Filings").

          4.7. Use of Proceeds. The proceeds of the sale of the Shares hereunder
shall be used by the Company for sales,  research  and  development  and general
corporate purposes consistent with its business as of the Closing Date.

          4.8. No Material Adverse Change. Except as identified and described in
the SEC Filings or as described on Schedule 4.8(a) of the Disclosure  Schedules,
since September 30, 2003, there has not been:

                                                             Page 23 of 70 Pages

               (i) any change in the consolidated assets, liabilities, financial
condition  or  operating  results  of the  Company  from that  reflected  in the
financial  statements  included  in the SEC  Filings,  except for changes in the
ordinary  course of business which have not and could not reasonably be expected
to have a Material Adverse Effect, individually or in the aggregate;

               (ii) any material  damage,  destruction  or loss,  whether or not
covered  by  insurance  to  any  assets  or  properties  of the  Company  or its
Subsidiaries;

               (iii)  any  satisfaction  or  discharge  of any  lien,  claim  or
encumbrance or payment of any obligation by the Company or a Subsidiary,  except
in the  ordinary  course of  business  and which is not  material to the assets,
properties, financial condition, operating results, prospects or business of the
Company and its Subsidiaries, taken as a whole;

               (iv)  any  change  or  amendment  to the  Company's  Articles  of
Incorporation  or  by-laws,  or  material  change to any  material  contract  or
arrangement  by which the Company or any  Subsidiary is bound or to which any of
their respective assets or properties is subject;

               (v) any material  labor  difficulties  or labor union  organizing
activities with respect to employees of the Company or any Subsidiary;

               (vi) the loss of the  services of any key  employee,  or material
change in the  composition or duties of the senior  management of the Company or
any Subsidiary;

               (vii) any other event or condition of any character  that has had
or could reasonably be expected to have a Material Adverse Effect;

               (viii) any  declaration or making any payment or  distribution to
stockholders  or purchase  or  redemption  of any share of its capital  stock or
other security other than to directors, officers and employees of the Company or
its  Subsidiaries  as compensation  for services  rendered to the Company or its
Subsidiary (as applicable) or for  reimbursement of expenses  incurred on behalf
of the Company or its Subsidiary (as applicable);

               (ix)  any  transfer  or  grant  of a right  with  respect  to the
patents,  trademarks,  trade names, service marks, trade secrets,  copyrights or
other  intellectual  property  rights  owned or  licensed  by the Company or its
Subsidiaries, except as among the Company and its Subsidiaries.; or

               (x) any:

          (A) sale,  assignment  or  transfer  of any of its  intangible  assets
except in the ordinary  course of business,  consistent  with past practice,  or
cancellation  of any debt or claim  except in the  ordinary  course of business,
consistent with past practice;

          (B)  waiver of any right of  substantial  value  whether or not in the
ordinary course of business; or

          (C) material  change in officer  compensation,  except in the ordinary
course of business and consistent with past practice.

          4.9.  SEC  Filings.  At the time of filing  thereof,  the SEC  Filings
complied in all material respects with the requirements of the 1933 Act and 1934
Act, as the case may be, and the rules and  regulations  of the SEC  promulgated
thereunder,  and did not contain any untrue statement of a material fact or omit
to state  any  material  fact  necessary  in order to make the  statements  made

                                                             Page 24 of 70 Pages

therein,  in the light of the  circumstances  under  which they were  made,  not
misleading.

          4.10.  No  Conflict,  Breach,  Violation  or Default.  The  execution,
delivery and  performance  of the  Transaction  Documents by the Company and the
consummation by the Company of the transactions  contemplated thereby do not and
will not  conflict  with or result in a breach or  violation of any of the terms
and provisions  of, or constitute a default or event that,  with notice or lapse
of time or both, would become a breach or default under (i) the Company's or any
Subsidiary's  Articles of  Incorporation  or the  Company's or any  Subsidiary's
by-laws,  each as in effect on the date hereof (true and accurate  copies of the
Company's  Articles  of  Incorporation  and  by-laws  have been  provided to the
Investors  before the date  hereof),  or (ii)(a)  any  material  statute,  rule,
regulation or order of any governmental agency or body or any court, domestic or
foreign,  having jurisdiction over the Company, its Subsidiaries or any of their
respective assets or properties,  or (b) except as set forth on Schedule 4.10 of
the  Disclosure  Schedules,  any agreement or instrument to which the Company or
its Subsidiaries is a party or by which the Company or its Subsidiaries is bound
or to which any of their respective assets or properties is subject. The Company
is not (with or without  the lapse of time or the giving of notice,  or both) in
breach or default of any Material  Contract.  Neither the Company nor any of its
Subsidiaries  has received any notice of the intention of any party to terminate
any Material Contract.

          4.11. Tax Matters.  Each of the Company and each Subsidiary has timely
prepared and filed all tax returns required to have been filed by the Company or
such Subsidiary with all appropriate  governmental  agencies and timely paid all
taxes shown thereon or otherwise owed by it. The charges,  accruals and reserves
on the books of the  Company  in respect  of taxes for all  fiscal  periods  are
adequate in all material respects,  and there are no material unpaid assessments
against the Company or any Subsidiary nor, to the Company's Knowledge, any basis
for the assessment of any additional taxes, penalties or interest for any fiscal
period or audits by any federal,  state or local taxing authority except for any
assessment which is not material to the Company and its Subsidiaries, taken as a
whole.  All taxes and other  assessments  and  levies  that the  Company  or any
Subsidiary  is required  to  withhold  or to collect for payment  have been duly
withheld and collected and paid to the proper governmental entity or third party
when  due.  There  are no tax  liens or  claims  pending  or,  to the  Company's
Knowledge,  threatened  against  the Company or any  Subsidiary  or any of their
respective  assets or  property.  Except as  described  on Schedule  4.11 of the
Disclosure  Schedules,  there are no outstanding tax sharing agreements or other
such arrangements between the Company and any Subsidiary or other corporation or
entity. Neither the Company nor any Subsidiary is presently undergoing any audit
by a taxing  authority,  or has waived or extended any statute of limitations at
the request of any taking authority.

          4.12.  Title to Properties.  Except as disclosed in the SEC Filings or
as set forth on Schedule 4.12 of the Disclosure Schedules,  the Company and each
Subsidiary  has good and marketable  title to all real  properties and all other
properties  and assets  owned by it, in each case free from liens,  encumbrances
and  defects  that  would  materially  affect the value  thereof  or  materially
interfere with the use made or currently planned to be made thereof by them; and
except as disclosed in the SEC Filings,  the Company and each  Subsidiary  holds
any leased real or personal property under valid and enforceable  leases with no
exceptions  that  would  materially  interfere  with the use  made or  currently
planned to be made thereof by them.

          4.13. Licenses; Compliance With FDA and Other Regulatory Requirements.

          (a) The Company and each Subsidiary holds all material authorizations,
consents, approvals,  franchises, licenses and permits required under applicable
law or  regulation  for the  operation  of the  business  of the Company and its
Subsidiaries as presently operated (the "Governmental Authorizations").  All the
Governmental  Authorizations  have been duly issued or obtained  and are in full

                                                             Page 25 of 70 Pages

force  and  effect,  and  the  Company  and  its  Subsidiaries  are in  material
compliance with the terms of all the  Governmental  Authorizations.  The Company
and its Subsidiaries  have not engaged in any activity that, to their knowledge,
would cause  revocation or suspension of any such  Governmental  Authorizations.
The Company has no knowledge of any facts which could  reasonably be expected to
cause the Company to believe that the  Governmental  Authorizations  will not be
renewed by the  appropriate  governmental  authorities  in the ordinary  course.
Neither  the  execution,  delivery  nor  performance  of  this  Agreement  shall
adversely affect the status of any of the Governmental Authorizations.

          (b)  Without  limiting  the  generality  of  the  representations  and
warranties made in sub-paragraph (a) above, the Company  represents and warrants
that (i) the Company and each of its Subsidiaries is in material compliance with
all applicable  provisions of the United States Federal Food,  Drug and Cosmetic
Act and the rules and  regulations  promulgated  thereunder  (the "FDC Act") and
equivalent  laws,  rules and  regulations  in  jurisdictions  outside the United
States in which the Company or its  Subsidiaries do business,  (ii) its products
and those of each of its Subsidiaries  that are in the Company's control are not
adulterated  or  misbranded  and are in  lawful  distribution,  (iii) all of the
products  marketed  by and  within  the  control  of the  Company  comply in all
material  respects  with  any  conditions  of  approval  and  the  terms  of the
application by the Company to the appropriate  Regulatory  Authorities,  (iv) no
Regulatory   Authority   has   initiated   legal  action  with  respect  to  the
manufacturing of the Company's  products,  such as seizures or required recalls,
and the Company is in compliance  with applicable  good  manufacturing  practice
regulations,  (v) its  products  are labeled and promoted by the Company and its
representatives  in  substantial  compliance  with the  applicable  terms of the
marketing  applications  submitted by the Company to the Regulatory  Authorities
and the  provisions  of the FDC Act and  foreign  equivalents,  (vi) all adverse
events  that  were  known to and  required  to be  reported  by  Company  to the
Regulatory  Authorities  have been reported to the  Regulatory  Authorities in a
timely  manner,  (vii)  neither the Company nor any of its  Subsidiaries  is, to
their  knowledge,  employing or utilizing the services of any individual who has
been  debarred  under the FDC Act or foreign  equivalents,  (viii) all stability
studies required to be performed for products  distributed by the Company or any
of its  Subsidiaries  have been completed or are ongoing in material  compliance
with  the  applicable  Regulatory  Authority  requirements,  (ix)  any  products
exported  by the  Company  or any of its  Subsidiaries  have  been  exported  in
compliance  with the FDC Act and (x) the  Company  and its  Subsidiaries  are in
compliance  in all  material  respects  with all  applicable  provisions  of the
Controlled  Substances  Act.  For  purposes of this  Section  4.13,  "Regulatory
Authority"  means  any  governmental  authority  in a  country  or  region  that
regulates the  manufacture  or sale of Company's  products,  including,  but not
limited to, the United States Food and Drug Administration.

          4.14. No Labor Disputes.  No material labor dispute with the employees
of the  Company or any  Subsidiary  exists or, to the  Company's  Knowledge,  is
imminent.

          4.15. Intellectual Property.

          (a) All  Intellectual  Property of the Company and its Subsidiaries is
currently in compliance with all legal  requirements  (including timely filings,
proofs and payments of fees) and is valid and  enforceable.  Except as listed on
Schedule  4.15(a)  of  the  Disclosure  Schedules  or in  the  SEC  Filings,  no
Intellectual Property of the Company or its Subsidiaries, which is necessary for
the conduct of the Company's and each of its Subsidiaries' respective businesses
as currently conducted or as currently proposed to be conducted,  has been or is
now involved in any cancellation,  dispute or litigation,  and, to the Company's
Knowledge, no such action is threatened. Except as listed on Schedule 4.15(a) of
the Disclosure  Schedules or in the SEC Filings, no patent of the Company or its
Subsidiaries  has  been  or  is  now  involved  in  any  interference,  reissue,
re-examination or opposition proceeding.

          (b) All of the licenses and sublicenses and consent,  royalty or other
agreements concerning  Intellectual Property which are necessary for the conduct

                                                             Page 26 of 70 Pages

of  the  Company's  and  each  of its  Subsidiaries'  respective  businesses  as
currently  conducted  or as  currently  proposed  to be  conducted  to which the
Company or any  Subsidiary  is a party or by which any of their assets are bound
(other than generally commercially available, non-custom, off-the-shelf software
application  programs having a retail acquisition price of less than $10,000 per
license) (collectively,  "License Agreements") are valid and binding obligations
of the  Company  or its  Subsidiaries  that  are  parties  thereto  and,  to the
Company's Knowledge,  the other parties thereto,  enforceable in accordance with
their  terms,  except to the extent that  enforcement  thereof may be limited by
bankruptcy,  insolvency,  reorganization,  moratorium,  fraudulent conveyance or
other similar laws affecting the enforcement of creditors' rights generally, and
there exists no event or condition which will result in a material  violation or
breach of or constitute  (with or without due notice or lapse of time or both) a
default  by the  Company  or any of its  Subsidiaries  under  any  such  License
Agreement.

          (c) The  Company and its  Subsidiaries  own or have the valid right to
use all of the  Intellectual  Property  that is necessary for the conduct of the
Company's  and each of its  Subsidiaries'  respective  businesses  as  currently
conducted or as currently proposed to be conducted, free and clear of all liens,
encumbrances,   adverse   claims  or  obligations  to  license  all  such  owned
Intellectual Property and Confidential Information,  other than licenses entered
into in the ordinary course of the Company's and its  Subsidiaries'  businesses.
The Company and its Subsidiaries  have a valid and enforceable  right to use all
third party Intellectual Property and Confidential  Information used or held for
use in the  respective  businesses  of  the  Company  and  its  Subsidiaries  as
currently conducted or as currently proposed to be conducted.

          (d) The conduct of the Company's and its  Subsidiaries'  businesses as
currently  conducted and as currently proposed to be conducted does not and will
not  infringe  any  Intellectual  Property  rights  of any  third  party  or any
confidentiality  obligation owed to a third party.  To the Company's  Knowledge,
the Intellectual  Property and  Confidential  Information of the Company and its
Subsidiaries  which are  necessary  for the conduct of the Company's and each of
its Subsidiaries'  respective  businesses as currently conducted or as currently
proposed to be conducted are not being  infringed by any third party.  Except as
set forth on Schedule 4.15(d) of the Disclosure Schedules or in the SEC Filings,
there is no  litigation  or order  pending or  outstanding  or, to the Company's
Knowledge,  threatened  or  imminent,  that seeks to limit or  challenge or that
concerns the ownership,  use,  validity or  enforceability  of any  Intellectual
Property or Confidential Information of the Company and its Subsidiaries and the
Company's and its Subsidiaries' use of any Intellectual Property or Confidential
Information owned by a third party, and, to the Company's Knowledge, there is no
valid basis for the same.

          (e) The consummation of the transactions  contemplated hereby will not
result in the alteration, loss, impairment of or restriction on the Company's or
its Subsidiaries'  ownership or right to use any of the Intellectual Property or
Confidential Information which is necessary for the conduct of the Company's and
its Subsidiaries'  respective  businesses as currently conducted or as currently
proposed to be conducted.

          (f) To the Company's  knowledge,  all software owned by the Company or
its Subsidiaries,  and, to the Company's  Knowledge,  all software licensed from
third parties by the Company or its Subsidiaries,  (i) is free from any material
defect, bug, virus, or programming, design or documentation error; (ii) operates
and runs in a reasonable and efficient  business  manner;  and (iii) conforms in
all material respects to the specifications and purposes thereof.

          (g) The Company and its  Subsidiaries  have taken  reasonable steps to
protect  the  Company's  and its  Subsidiaries'  rights  in  their  Intellectual
Property and Confidential Information.  Each employee, consultant and contractor

                                                             Page 27 of 70 Pages

who has had  access  to  Confidential  Information  which is  necessary  for the
conduct  of  the  Company's  and  its  Subsidiaries'  respective  businesses  as
currently  conducted  or as currently  proposed to be conducted  has executed an
agreement to maintain the  confidentiality of such Confidential  Information and
has executed appropriate  agreements that are substantially  consistent with the
Company's standard forms therefor. To the Company's knowledge, there has been no
material  disclosure of any of the Company's or its  Subsidiaries'  Confidential
Information to any third party without the Company's consent.

          4.16.  Environmental  Matters.  Neither the Company nor any Subsidiary
(i) is in violation of any statute, rule,  regulation,  decision or order of any
governmental agency or body or any court,  domestic or foreign,  relating to the
use,  disposal or release of  hazardous or toxic  substances  or relating to the
protection or restoration  of the  environment or human exposure to hazardous or
toxic substances (collectively, "Environmental Laws"), (ii) owns or operates any
real  property   contaminated   with  any  substance  that  is  subject  to  any
Environmental  Laws, (iii) is liable for any off-site  disposal or contamination
pursuant to any Environmental Laws, and (iv) is subject to any claim relating to
any Environmental Laws; which violation,  contamination,  liability or claim has
had or  could  reasonably  be  expected  to  have  a  Material  Adverse  Effect,
individually  or in the aggregate;  and there is no pending or, to the Company's
Knowledge,  threatened  investigation  that  might  lead to such a claim.  4.17.
Litigation.  Except  as  disclosed  in the SEC  Filings,  there  are no  pending
actions, suits or proceedings against or affecting the Company, its Subsidiaries
or any of its or  their  properties;  and to the  Company's  Knowledge,  no such
actions,  suits or proceedings are threatened or  contemplated  before or by any
court, arbitrator, governmental or administrative agency or regulatory authority
(federal, state, county, local or foreign) (collectively,  an "Action"). Neither
the Company  nor any  Subsidiary,  nor, to the  knowledge  of the  Company,  any
director or officer thereof,  is or has been the subject of any Action involving
a claim of violation of or liability under federal or state securities laws or a
claim of breach of fiduciary  duty. To the  knowledge of the Company,  there has
not been and there is not pending any  investigation  by the SEC  involving  the
Company or any current or former director or officer of the Company. The SEC has
not issued any stop order or other order  suspending  the  effectiveness  of any
registration statement filed by the Company or any Subsidiary under the 1934 Act
or the 1933 Act.

          4.18. Financial Statements.  The financial statements included in each
SEC  Filing  comply  in  all  material   respects  with  applicable   accounting
requirements and the rules and regulations of the SEC with respect thereto as in
effect at the time of filing.  Such  financial  statements  fairly  present  the
consolidated  financial  position  of the  Company as of the dates shown and its
consolidated  results of operations  and cash flows for the periods  shown,  and
such financial  statements  have been prepared in conformity  with United States
generally accepted  accounting  principles applied on a consistent basis. Except
as set forth in the  financial  statements  of the  Company  included in the SEC
Filings  filed  prior to the date  hereof,  neither  the  Company nor any of its
Subsidiaries has incurred any liabilities, contingent or otherwise, except those
which, individually or in the aggregate, have not had or could not reasonably be
expected to have a Material Adverse Effect.

          4.19. Insurance Coverage. The Company and each Subsidiary maintains in
full  force  and  effect  insurance  coverage  listed  on  Schedule  4.19 of the
Disclosure Schedules and the Company reasonably believes such insurance coverage
is adequate.

          4.20.  Brokers and Finders.  Except for the cash commission to be paid
(the "Cash Placement Agent Fee") and warrants to be issued (the "Placement Agent
Warrants") to the Placement  Agent pursuant to the terms of the Placement  Agent
Agreement, no Person will have, as a result of the transactions  contemplated by
this Agreement,  any valid right, interest or claim against or upon the Company,
any  Subsidiary or any Investor for any  commission,  fee or other  compensation

                                                             Page 28 of 70 Pages

pursuant to any agreement,  arrangement or  understanding  entered into by or on
behalf of the  Company.  For all  purposes  under this  Agreement  and the other
Transaction  Documents,  the Placement Agent shall be deemed to be an "Investor"
and the Placement Agent Warrants shall be deemed to be "Warrants."

          4.21. No Directed Selling Efforts or General Solicitation. Neither the
Company  nor  any  Person  acting  on its  behalf  has  conducted  any  "general
solicitation" or "general advertising" (as those terms are used in Regulation D)
in connection with the offer or sale of any of the Securities.

          4.22.  No  Integrated  Offering.  Neither  the  Company nor any of its
Affiliates,  nor any  Person  acting on its or their  behalf  has,  directly  or
indirectly,  made any offers or sales of any Company  security or solicited  any
offers to buy any security,  under  circumstances  that would  adversely  affect
reliance by the Company on Section 4(2) of the 1933 Act for the  exemption  from
the  registration  requirements  imposed under Section 5 of the 1933 Act for the
transactions  contemplated  hereby or would require such registration  under the
1933 Act.

          4.23. Private Placement.  Assuming the accuracy of the representations
and  warranties  of the Investors  contained in Section 5 hereof,  the offer and
sale of the Securities to the Investors as contemplated  hereby does not require
registration of the Securities  under the 1933 Act. The issuance and sale of the
Securities  hereunder  does not  contravene  the  rules and  regulations  of any
Trading Market.

          4.24. Transactions with Affiliates. Except as disclosed in SEC Filings
made on or prior to the date  hereof,  none of the  officers or directors of the
Company and, to the Company's Knowledge, none of the employees of the Company is
presently a party to any  transaction  with the Company or a Subsidiary  or to a
presently  contemplated  transaction  (other  than for  services  as  employees,
officers and directors) that would be required to be disclosed  pursuant to Item
404 of Regulation  S-K  promulgated  under the 1933 Act,  without  regard to the
dollar thresholds contained in such Item.

          4.25  Compliance.  Neither the Company  nor any  Subsidiary  (i) is in
material  default  under or in violation of (and no event has occurred  that has
not been waived  that,  with notice or lapse of time or both,  would result in a
default by the  Company or any  Subsidiary  under),  nor has the  Company or any
Subsidiary  received notice of a claim that it is in default under or that it is
in violation of, any material  indenture,  loan or credit agreement or any other
agreement  or  instrument  to  which  it is a party or by which it or any of its
properties is bound  (whether or not such default or violation has been waived),
(ii) is in violation of any order of any court, arbitrator or governmental body,
or (iii) is or has been in violation of any statute,  rule or  regulation of any
governmental authority, including without limitation all foreign, federal, state
and local laws applicable to its business.

          4.26 Listing and Maintenance Requirements. The Company has not, in the
12 months preceding the date hereof,  received notice from any Trading Market on
which the Common  Stock is or has been  listed or quoted to the effect  that the
Company is not in compliance  with the listing or  maintenance  requirements  of
such Trading  Market.  The Company is, and has no reason to believe that it will
not in the  foreseeable  future  continue  to be,  in  compliance  with all such
listing and maintenance requirements.

          4.27 Disclosure. The Company confirms that neither the Company nor, to
its knowledge, any other Person acting on its behalf and at the direction of the
Company has  provided  any of the  Investors or their agents or counsel with any
information  that  in  the  Company's  reasonable  judgment,  at the  time  such
information was furnished,  constitutes material,  non-public  information.  The
Company  understands  and confirms that the Investors will rely on the foregoing
representations  and  covenants in effecting  transactions  in securities of the
Company. All disclosure provided to the Investors regarding the Company included
in this  Agreement and the  Disclosure  Schedules to this Agreement are true and
correct in all material respects.

                                                             Page 29 of 70 Pages

     5.  Representations and Warranties of the Investors.  Each of the Investors
hereby  severally,  and not jointly,  represents and warrants to the Company and
the Placement Agent that:

          5.1.  Authorization.  The execution,  delivery and  performance by the
Investor of the  Transaction  Documents  to which such  Investor is a party have
been duly  authorized  and will each  constitute  the valid and legally  binding
obligation of the Investor,  enforceable against the Investor in accordance with
their respective terms, subject to bankruptcy,  insolvency, fraudulent transfer,
reorganization,  moratorium and similar laws of general applicability,  relating
to or affecting creditors' rights generally.

          5.2. Purchase Entirely for Own Account.  The Securities to be received
by the Investor  hereunder will be acquired for the Investor's own account,  not
as nominee or agent,  and not with a view to the resale or  distribution  of any
part  thereof in  violation  of the 1933 Act,  and the  Investor  has no present
intention of selling,  granting any participation in, or otherwise  distributing
the same in violation  of the 1933 Act. The Investor is not a registered  broker
dealer or an entity engaged in the business of being a broker dealer.

          5.3. Investment Experience. The Investor acknowledges that it can bear
the economic risk and complete loss of its  investment in the Securities and has
such  knowledge  and  experience  in  financial  or business  matters that it is
capable  of  evaluating  the  merits  and risks of the  investment  contemplated
hereby.  The Investor is  experienced  in making  private  investments in public
equities, similar to the purchase of the Securities hereunder.

          5.4. Disclosure of Information. The Investor has had an opportunity to
receive all additional information related to the Company requested by it and to
ask questions of and receive answers from the Company regarding the Company, its
business and the terms and  conditions  of the offering of the  Securities.  The
Investor  acknowledges  receipt of copies of and its satisfactory  review of the
SEC Filings.

          5.5.  Restricted   Securities.   The  Investor  understands  that  the
Securities are  characterized as "restricted  securities" under the U.S. federal
securities  laws  inasmuch  as they are being  acquired  from the  Company  in a
transaction  not  involving  a public  offering  and that  under  such  laws and
applicable  regulations such securities may be resold without registration under
the 1933 Act only in certain limited circumstances.

          5.6. Legends.

          (a) It is understood that certificates  evidencing such Securities may
bear the following or any similar legend:

          "The  securities  represented  hereby may not be transferred
          unless (i) such  securities  have been  registered  for sale
          pursuant to the Securities Act of 1933, as amended,  or (ii)
          the Company has received an opinion of counsel  satisfactory
          to it that  such  transfer  may  lawfully  be  made  without
          registration   under   the   Securities   Act  of   1933  or
          qualification under applicable state securities laws."

          (b) If required by the authorities of any state in connection with the
issuance of sale of the Securities, the legend required by such state authority.

          (c) Notwithstanding the foregoing, the Company acknowledges and agrees

                                                             Page 30 of 70 Pages

that the Investors may transfer the Securities in compliance with applicable law
at any time and that certificates evidencing the Shares and Warrant Shares shall
not contain any legend  (including  without  limitation  the legend set forth in
Section  5.6(a)),  (i) following any valid sale of such Shares or Warrant Shares
pursuant to Rule 144, or (ii) if such Shares or Warrant  Shares are eligible for
sale under Rule 144(k).  The Company  agrees that at such time as such legend is
no longer  required under this Section  5.6(c)(i),  it will, no later than three
(3) Trading  Days  following  the  delivery by a Purchaser to the Company or the
Company's transfer agent of a certificate representing Shares or Warrant Shares,
as the case may be,  issued with a  restrictive  legend,  deliver or cause to be
delivered to such Investor a certificate  representing  such  Securities that is
free from all restrictive and other legends.

          5.7. Accredited.  The Investor is an "accredited  investor" as defined
in Rule 501(a) of Regulation D, as amended, under the 1933 Act.

          5.8.  No  General  Solicitation.  The  Investor  did not  learn of the
investment  in the  Securities  as a  result  of any  "general  advertising"  or
"general  solicitation"  as those terms are  contemplated  in  Regulation  D, as
amended Investor, under the 1933 Act.

          5.9.  Brokers and  Finders.  No Person  will have,  as a result of the
transactions  contemplated by this Agreement, any valid right, interest or claim
against or upon the Company,  any Subsidiary or an Investor for any  commission,
fee  or  other   compensation   pursuant  to  any   agreement,   arrangement  or
understanding entered into by or on behalf of the Investors.

     6. Conditions to Closing.

          6.1. Conditions to the Investors'  Obligations.  The obligation of the
Investors  to  purchase  the  Securities  at  the  Closing  is  subject  to  the
fulfillment to the Placement  Agent's  satisfaction,  on or prior to the Closing
Date, of the following conditions:

          (a) The  representations and warranties made by the Company in Section
4 hereof shall be true and correct in all  material  respects at all times prior
to and on the Closing  Date.  The Company  shall have  performed in all material
respects  all  obligations  and  conditions  herein  required to be performed or
observed by it on or prior to the Closing Date.

          (b) The Company  shall have  obtained in a timely  fashion any and all
consents, permits, approvals, registrations and waivers necessary or appropriate
for  consummation of the purchase and sale of the  Securities,  and all of which
shall be and remain so long as necessary in full force and effect.

          (c) The Company shall have executed and delivered this
Agreement and the Registration Rights Agreement to the Placement Agent (which
shall constitute delivery to each Investor).

          (d) No judgment, writ, order, injunction, award or decree of or by any
court, or judge, justice or magistrate, including any bankruptcy court or judge,
or any order of or by any governmental authority, shall have been issued, and no
action or proceeding shall have been instituted by any  governmental  authority,
or self-regulatory  organization enjoining or preventing the consummation of the
transactions contemplated hereby or in the other Transaction Documents.

          (e) The Company shall have delivered a Certificate, executed on behalf
of the Company by its Chief Executive  Officer or its Chief  Financial  Officer,
dated as of the Closing Date,  certifying to the  fulfillment  of the conditions
specified in subsections (a), (b) and (d) of this Section 6.1.

                                                             Page 31 of 70 Pages


          (f) The Company shall have delivered a Certificate, executed on behalf
of the Company by its  Secretary,  dated as of the Closing Date,  certifying the
resolutions  adopted by the Board of  Directors  of the  Company  approving  the
transactions  contemplated by this Agreement and the other Transaction Documents
and the  issuance of the  Securities,  certifying  the  current  versions of the
Articles of  Incorporation  and by-laws of the Company and  certifying as to the
signatures  and  authority  of persons  signing the  Transaction  Documents  and
related documents on behalf of the Company.

          (g) The  Investors  and the  Placement  Agent  shall have  received an
opinion from Paul, Hastings, Janofsky & Walker LLP, the Company's counsel, dated
as of the Closing Date, in the form attached hereto as Exhibit C.

          (h) The Company  shall have  delivered,  or caused to be  delivered to
each Investor (i) an original stock certificate  evidencing the number of shares
of Common Stock  purchased by such  Investor as described in Schedule I and (ii)
an  original  Warrant  certificate,  registered  in the  name of  such  Investor
pursuant  to which  such  Investor  shall have the right to  purchase  up to the
number of shares of Common Stock as described in Schedule I.

          6.2.   Conditions  to  Obligations  of  the  Company.   The  Company's
obligation  to sell and issue the  Securities  at the  Closing is subject to the
fulfillment to the  satisfaction  of the Company on or prior to the Closing Date
of the following conditions, any of which may be waived by the Company:

          (a)  The  representations  and  warranties  made by the  Investors  in
Section 5 hereof shall be true and correct in all material  respects  when made,
and shall be true and correct in all material  respects on the Closing Date with
the same force and effect as if they had been made on and as of said date.

          (b) The Investors shall have executed and delivered this Agreement and
the Registration Rights Agreement to the Placement Agent at or prior to Closing;
provided,  that, this condition shall be satisfied with respect to each Investor
who has  executed and  delivered  this  Agreement  and the  Registration  Rights
Agreement.

          (c) Each of the  Investors  shall have  delivered to the Company at or
prior to  Closing  the  "Aggregate  Purchase  Price"  set  forth  opposite  such
Investor's name on Schedule I affixed hereto.

          (d) No judgment, writ, order, injunction, award or decree of or by any
court, or judge, justice or magistrate, including any bankruptcy court or judge,
or any order of or by any governmental authority, shall have been issued, and no
action or proceeding shall have been instituted by any  governmental  authority,
or self-regulatory  organization enjoining or preventing the consummation of the
transactions contemplated hereby or in the other Transaction Documents.

     7. Covenants and Agreements of the Company.

          7.1.  Reservation  of Common  Stock.  The  Company  shall at all times
reserve and keep available out of its  authorized but unissued  shares of Common
Stock,  solely for the purpose of providing  for the  exercise of the  Warrants,
such  number  of shares of  Common  Stock as shall  from time to time  equal the
number of shares  sufficient  to permit the exercise of the Warrants  (including
the Placement  Agent  Warrants)  issued pursuant to this Agreement in accordance
with their respective  terms. 7.2. No Conflicting  Agreements.  The Company will
not take any action,  enter into any agreement or make any commitment that would
breach in any material  respect the  obligations of the Company to the Investors
under the Transaction Documents.

                                                             Page 32 of 70 Pages


          7.3.  Termination of Certain Covenants.  The provisions of Section 7.2
shall terminate and be of no further force and effect upon the date on which the
Company's  obligations  under the Registration  Rights Agreement to register and
maintain  the  effectiveness  of  any  registration   covering  the  Registrable
Securities (as such term is defined in the Registration  Rights Agreement) shall
terminate.

          7.4  Furnishing  of   Information.   As  long  as  any  Investor  owns
Securities,  the  Company  covenants  to timely  file (or obtain  extensions  in
respect  thereof  and file  within the  applicable  grace  period)  all  reports
required to be filed by the Company  after the date hereof  pursuant to the 1934
Act.  Upon the  request of any such  holder of  Securities,  the  Company  shall
deliver to such holder a written  certification of a duly authorized  officer as
to whether it has complied  with the  preceding  sentence.  The Company  further
covenants  that it will take such further action as any holder of Securities may
reasonably request,  all to the extent required from time to time to enable such
Person to sell such Securities  without  registration  under the 1933 Act within
the limitation of the exemptions provided by Rule 144.

          7.5 Integration. The Company shall not sell, offer for sale or solicit
offers to buy or  otherwise  negotiate in respect of any security (as defined in
Section 2 of the 1933 Act) that  would be  integrated  with the offer or sale of
the  Securities in a manner that would require the  registration  under the 1933
Act of the sale of the  Securities  to the Investors or that would be integrated
with  the  offer  or  sale of the  Securities  for  purposes  of the  rules  and
regulations of any Trading Market.

          7.6 Publicity. As soon as reasonably practicable following the Closing
Date,  the  Company  shall  file a Current  Report on Form 8-K,  disclosing  the
transactions  contemplated hereby and make such other filings and notices in the
manner and time  required by the SEC. The Company and SCO  Securities  LLC shall
consult  with each  other in  issuing  any press  releases  with  respect to the
transactions  contemplated  hereby, and neither the Company nor any Investor nor
SCO Securities LLC shall issue any such press release or otherwise make any such
public statement  without the prior consent of the Company,  with respect to any
press  release of any  Investor  or SCO  Securities  LLC,  or without  the prior
consent of SCO Securities LLC, with respect to any press release of the Company,
except if such disclosure is required by law, in which case the disclosing party
shall  promptly  provide  the other  party  with  prior  notice  of such  public
statement or communication.

          7.7  Non-Public  Information.  The Company  covenants  and agrees that
neither it nor any other  Person  acting on its behalf will provide any Investor
or its  agents  or  counsel  with  any  information  that the  Company  believes
constitutes material non-public information,  unless prior thereto such Investor
shall have executed a written agreement regarding the confidentiality and use of
such information.  The Company understands and confirms that each Investor shall
be  relying  on the  foregoing  representations  in  effecting  transactions  in
securities of the Company.

          7.8 Use of  Proceeds.  The  Company  covenants  and  agrees  that  the
proceeds  from the sale of the Common  Stock and  Warrants  shall be used by the
Company  for  working  capital  and  general   corporate   purposes;   under  no
circumstances shall any portion of the proceeds be applied to:

          (i)  the payment of  dividends or other  distributions  on any capital
               stock of the Company;

          (ii) the  purchase  of  debt  or  equity  securities  of  any  Person,
               including the Company and its Subsidiaries,  except in connection
               with  investment of excess cash in high quality (A1/P1 or better)
               money market  instruments  having maturities of one year or less;
               or

          (iii) any expenditure not related to the business of the Company.

                                                             Page 33 of 70 Pages

          7.9  Reservation of Common Stock.  As of the date hereof,  the Company
has reserved and the Company shall continue to reserve and keep available at all
times, free of preemptive  rights, a sufficient number of shares of Common Stock
for the  purpose of  enabling  the  Company  to issue  Shares  pursuant  to this
Agreement and Warrant Shares pursuant to the Warrants.

          7.10  Listing  of  Common  Stock.  The  Company  hereby  agrees to use
commercially  reasonable  efforts to maintain the listing of the Common Stock on
the American Stock Exchange or any applicable Trading Market,  and, if required,
as soon as reasonably  practicable  following the Closing to list the applicable
Shares and Warrant  Shares on the  American  Stock  Exchange  or any  applicable
Trading Market.  The Company further agrees,  if the Company applies to have the
Common  Stock  traded on any  other  Trading  Market,  it will  include  in such
application the Shares and the Warrant  Shares,  and will take such other action
as is  necessary  to cause the  Shares and  Warrant  Shares to be listed on such
other Trading Market as promptly as possible.

          7.11 Securities Law  Compliance.  The Company shall timely prepare and
file with the SEC the form of notice of the sale of  securities  pursuant to the
requirements of Regulation D regarding the sale of the Common Stock and Warrants
under this Agreement.

     8. Survival and Indemnification.

          8.1.  Survival.   All  representations,   warranties,   covenants  and
agreements  contained in this Agreement  shall be deemed to be  representations,
warranties, covenants and agreements as of the date hereof and shall survive the
Closing Date for a period of eighteen (18) months;  provided,  however, that the
provisions contained in Section 7 hereof shall survive in accordance  therewith.
The  Company's  representations  and  warranties  shall in no way be affected or
diminished in any way by any  investigation  of (or failure to investigate)  the
subject matter thereof made by or on behalf of the Investors.

          8.2.  Indemnification.  The  Company  agrees  to  indemnify  and  hold
harmless,  each Investor and the Placement  Agent and its respective  Affiliates
and the  directors,  officers  and  employees,  the  Placement  Agent  and their
respective  Affiliates,  from and against any and all losses,  claims,  damages,
liabilities and expenses (including without limitation  reasonable attorney fees
and disbursements and other expenses incurred in connection with  investigating,
preparing or defending any action,  claim or  proceeding,  pending or threatened
and the costs of  enforcement  hereof)  (collectively,  "Losses")  to which such
Person may become subject as a result of any breach of representation, warranty,
covenant or  agreement  made by, or to be  performed on the part of, the Company
under the Transaction Documents, and will reimburse any such Person for all such
amounts as they are incurred by such Person.

          8.3. Conduct of Indemnification Proceedings. Promptly after receipt by
any  Person  (the  "Indemnified  Person")  of  notice  of any  demand,  claim or
circumstances  which would or might give rise to a claim or the  commencement of
any action,  proceeding or  investigation  in respect of which  indemnity may be
sought  pursuant to Section 8.2, such  Indemnified  Person shall promptly notify
the  Company in writing  and the  Company  shall  assume  the  defense  thereof,
including the employment of counsel reasonably  satisfactory to such Indemnified
Person,  and  shall  assume  the  payment  of all fees and  expenses;  provided,
however,  that the  failure of any  Indemnified  Person so to notify the Company
shall not relieve the Company of its obligations  hereunder except to the extent
that the  Company is  actually  and  materially  prejudiced  by such  failure to
notify. In any such proceeding,  any Indemnified  Person shall have the right to
retain its own counsel,  but the fees and  expenses of such counsel  shall be at
the  expense  of  such  Indemnified  Person  unless:  (i)  the  Company  and the
Indemnified  Person shall have mutually agreed to the retention of such counsel;
or (ii) in the  reasonable  judgment  of  counsel  to  such  Indemnified  Person
representation of both parties by the same counsel would be inappropriate due to
actual or potential conflicts of interest between them. The Company shall not be

                                                             Page 34 of 70 Pages

liable  for any  settlement  of any  proceeding  effected  without  its  written
consent,  which  consent  shall  not  be  unreasonably   withheld,   delayed  or
conditioned,  but if settled with such consent,  or if there be a final judgment
for  the  plaintiff,   the  Company  shall  indemnify  and  hold  harmless  such
Indemnified  Person from and against any Losses by reason of such  settlement or
judgment.  Without the prior written  consent of the Indemnified  Person,  which
consent shall not be unreasonably withheld, delayed or conditioned,  the Company
shall not effect any  settlement  of any  pending or  threatened  proceeding  in
respect  of which  any  Indemnified  Person  is or could  have  been a party and
indemnity could have been sought  hereunder by such  Indemnified  Party,  unless
such settlement  includes an unconditional  release of such  Indemnified  Person
from all liability arising out of such proceeding.

     9. Miscellaneous.

          9.1.  Successors and Assigns.  This Agreement may not be assigned by a
party hereto without the prior written  consent of the Company or the Investors,
as  applicable;  provided,  however,  that an Investor may assign its rights and
delegate its duties  hereunder in whole or in part to an Affiliate or to a third
party acquiring some or all of its Securities in a private transaction  effected
in compliance  with  applicable  laws  (including  applicable  securities  laws)
without the prior written consent of the Company or the other  Investors,  after
notice  duly  given by such  Investor  to the  Company,  provided,  that no such
assignment  or  obligation   shall  affect  the  obligations  of  such  Investor
hereunder. The provisions of this Agreement shall inure to the benefit of and be
binding upon the  respective  permitted  successors  and assigns of the parties.
Except for Placement Agent, which is an express intended third party beneficiary
of this Agreement, nothing in this Agreement, express or implied, is intended to
confer  upon  any  party  other  than the  parties  hereto  or their  respective
successors and assigns any rights, remedies,  obligations,  or liabilities under
or by reason of this Agreement.

          9.2.  Counterparts;  Faxes.  This  Agreement may be executed in two or
more counterparts,  each of which shall be deemed an original,  but all of which
together shall constitute one and the same  instrument.  This Agreement may also
be executed via facsimile, which shall be deemed an original.

          9.3.  Titles and Subtitles;  Interpretation.  The titles and subtitles
used  in  this  Agreement  are  used  for  convenience  only  and  are not to be
considered  in  construing  or  interpreting  this  Agreement.  Throughout  this
Agreement,  where a form of the word "include"  occurs, it shall be deemed to be
followed by the phrase "without limitation."

          9.4.  Notices.  Unless  otherwise  provided,  any notice  required  or
permitted  under this  Agreement  shall be given in writing  and shall be deemed
effectively  given as hereinafter  described (i) if given by personal  delivery,
then such  notice  shall be deemed  given upon such  delivery,  (ii) if given by
telex or  telecopier,  then such notice  shall be deemed  given upon  receipt of
confirmation of complete  transmittal,  (iii) if given by mail, then such notice
shall be deemed  given  upon the  earlier of (A)  receipt of such  notice by the
recipient  or (B) three days after such notice is deposited in first class mail,
postage prepaid,  and (iv) if given by an internationally  recognized  overnight
air courier,  then such notice  shall be deemed given one day after  delivery to
such carrier.  All notices shall be addressed to the party to be notified at the
address as follows,  or at such other address as such party may designate by ten
days' advance written notice to the other party:


                                                             Page 35 of 70 Pages



If to the Company:

                              Bioenvision, Inc.
                              509 Madison Avenue,
                              Suite 404
                              New York, New York 10022
                              Attention:  David P. Luci, General Counsel
                              Fax:  212-750-6777

                     With a copy to:

                              Paul, Hastings, Janofsky & Walker LLP
                              75 E. 55th Street
                              New York, New York 10022
                              Attention:  Luke P. Iovine, III, Esq.
                              Fax:  212-319-4090

                     If to any of the Investors:

                              to the addresses set forth on Schedule I hereto.

                     With a copy to:

                              SCO Securities LLC
                              1285 Avenue of the Americas
                              35th Floor
                              New York, New York 10019
                              Attn:  Mr. Jeffrey B. Davis, President
                              Fax:  212-554-4058

          9.5. Expenses. The Company shall be responsible for the payment of the
Investors'  reasonable and documented legal fees and other third-party  expenses
relating to the preparation, negotiation and execution of this Agreement and the
Transaction  Documents and the  consummation  of the  transactions  contemplated
herein.

          9.6.  Amendments and Waivers. No term of this Agreement may be amended
and the  observance of any term of this  Agreement  shall not be waived  (either
generally   or  in  a   particular   instance   and  either   retroactively   or
prospectively),  without  the  prior  written  consent  of the  Company  and the
Placement Agent; provided,  however, that any provision hereof which impairs the
rights or increases the obligations of a specific  Investor shall not be amended
or waived without the prior written consent of the Company,  the Placement Agent
and that particular Investor;  provided,  further,  that any provision affecting
the rights or  obligations  of Placement  Agent,  shall not be waived or amended
without the prior  written  consent of the  Placement  Agent.  Any  amendment or
waiver  effected in accordance  with this Section 9.6 shall be binding upon each
holder of any Securities purchased under this Agreement at the time outstanding,
each future holder of all such Securities, and the Company.

          9.7.  Publicity.  No public  release or  announcement  concerning  the
transactions contemplated hereby shall be issued by the Company or the Investors
without  the  prior  consent  of the  Company  (in  the  case  of a  release  or
announcement by the Investors) or the Placement Agent, as  representative of the
Investors  (in the case of a release  or  announcement  by the  Company)  (which
consents  shall  not be  unreasonably  withheld),  except  as  such  release  or

                                                             Page 36 of 70 Pages

announcement  may be required by law or the  applicable  rules or regulations of
any  securities  exchange or securities  market on which the Securities are then
listed and trading,  in which case the Company or the  Placement  Agent,  as the
case may be, shall allow the  Investors or the Company,  as  applicable,  to the
extent reasonably  practicable in the circumstances,  reasonable time to comment
on such release or announcement in advance of such issuance.

          9.8. Severability.  Any provision of this Agreement that is prohibited
or  unenforceable  in  any  jurisdiction  shall,  as to  such  jurisdiction,  be
ineffective  to the  extent  of such  prohibition  or  unenforceability  without
invalidating the remaining  provisions  hereof but shall be interpreted as if it
were  written  so as to be  enforceable  to  the  maximum  extent  permitted  by
applicable law, and any such prohibition or unenforceability in any jurisdiction
shall  not  invalidate  or  render  unenforceable  such  provision  in any other
jurisdiction.  To the extent  permitted by  applicable  law, the parties  hereby
waive any  provision of law which  renders any  provision  hereof  prohibited or
unenforceable in any respect.

          9.9.  Entire  Agreement.  This  Agreement,  including  the  Schedules,
Exhibits  and the  Disclosure  Schedules,  and the other  Transaction  Documents
constitute  the entire  agreement  among the parties  hereof with respect to the
subject  matter  hereof and  thereof  and  supersede  all prior  agreements  and
understandings,  both oral and written,  between the parties with respect to the
subject  matter hereof and thereof.  Prior drafts or versions of this  Agreement
shall not be used to interpret this Agreement.

          9.10.  Further  Assurances.  The parties shall execute and deliver all
such further  instruments  and  documents and take all such other actions as may
reasonably be required to carry out the transactions  contemplated hereby and to
evidence the fulfillment of the agreements herein contained.

          9.11. Governing Law; Consent to Jurisdiction.  This Agreement shall be
governed by, and construed in accordance with, the internal laws of the State of
New York without  regard to the choice of law  principles  thereof.  Each of the
parties hereto irrevocably  submits to the exclusive  jurisdiction of the courts
of the  State of New York  located  in New York  County  and the  United  States
District  Court for the  Southern  District  of New York for the  purpose of any
suit,  action,  proceeding  or  judgment  relating  to or  arising  out of  this
Agreement  and the  transactions  contemplated  hereby.  Service  of  process in
connection with any such suit,  action or proceeding may be served on each party
hereto anywhere in the world by the same methods as are specified for the giving
of notices under this Agreement. Each of the parties hereto irrevocably consents
to the jurisdiction of any such court in any such suit, action or proceeding and
to the laying of venue in such court. Each party hereto  irrevocably  waives any
objection to the laying of venue of any such suit, action or proceeding  brought
in such courts and  irrevocably  waives any claim that any such suit,  action or
proceeding brought in any such court has been brought in an inconvenient forum.

          9.12  Replacement  of  Securities.  If any  certificate  or instrument
evidencing any Shares or Warrant Shares is mutilated, lost, stolen or destroyed,
the Company shall issue or cause to be issued in exchange and  substitution  for
and upon cancellation  thereof, or in lieu of and substitution  therefor,  a new
certificate  or  instrument,  but  only  upon  receipt  of  evidence  reasonably
satisfactory to the Company of such loss, theft or destruction and customary and
reasonable indemnity, if requested by the Company.

          9.13  Remedies.  In addition to being  entitled to exercise all rights
provided herein or granted by law,  including  recovery of damages,  each of the
Investors  and the Company  will be entitled to specific  performance  under the
Transaction  Documents.  The  parties  agree that  monetary  damages  may not be
adequate  compensation  for  any  loss  incurred  by  reason  of any  breach  of
obligations  described in the  foregoing  sentence and hereby agrees to waive in
any action for specific  performance  of any such  obligation the defense that a
remedy at law would be adequate.

                                                             Page 37 of 70 Pages


          9.14  Independent  Nature of Purchasers'  Obligations and Rights.  The
obligations of each Investor under any Transaction  Document are several and not
joint with the  obligations  of any other  Investor,  and no  Investor  shall be
responsible  in any way for the  performance  of the  obligations  of any  other
Investor under any  Transaction  Document.  Nothing  contained  herein or in any
Transaction  Document,  and no action  taken by any Investor  pursuant  thereto,
shall be deemed to constitute the Investors as a partnership,  an association, a
joint  venture  or any other kind of entity,  or create a  presumption  that the
Investors  are in any way acting in  concert or as a group with  respect to such
obligations or the transactions  contemplated by the Transaction Document.  Each
Investor  shall be  entitled  to  independently  protect and enforce its rights,
including without limitation, the rights arising out of this Agreement or out of
the other  Transaction  Documents,  and it shall not be necessary  for any other
Investor to be joined as an additional party in any proceeding for such purpose.
Each  Investor  acknowledges  that it has been  represented  by its own separate
legal counsel in its review and  negotiation of the Transaction  Documents.  For
reasons of  administrative  convenience only, the Investors and their respective
counsel have chosen to communicate with the Company through Wiggin and Dana LLP,
but  Investors  acknowledge  that such  counsel  does not  represent  any of the
Investors in this  transaction  other than SCO  Securities  LLC. The Company has
elected to provide all Investors with the same terms and  Transaction  Documents
for the  convenience of the Company and not because it was required or requested
to do so by the Investors.

          9.15 Waiver of Trial by Jury.  THE PARTIES  HERETO  IRREVOCABLY  WAIVE
TRIAL BY JURY IN ANY SUIT,  ACTION OR PROCEEDING  RELATING TO THIS  AGREEMENT OR
THE TRANSACTIONS CONTEMPLATED HEREBY.






                            [signature page follows]


                                                             Page 38 of 70 Pages


                            [Company Signature Page]

          IN  WITNESS  WHEREOF,  the  undersigned  has  executed  this  Purchase
Agreement  or caused  its duly  authorized  officers  to execute  this  Purchase
Agreement as of the date first above written.

                              BIOENVISION, INC.



                              By:
                                 -----------------------------------------------
                              Name:  David P. Luci
                              Title: Chief Financial Officer and
                                     General Counsel




                                                             Page 39 of 70 Pages


                            [Investor Signature Page]

     IN WITNESS WHEREOF, the undersigned has executed this Purchase Agreement or
caused its duly authorized officers to execute this Purchase Agreement as of the
date first above written.


Date:
      -------------------

IF AN INDIVIDUAL:                           IF A CORPORATION, PARTNERSHIP,
                                              TRUST, ESTATE OR OTHER ENTITY:
-----------------------------------
(Signature)
                                            ------------------------------------
                                            Print name of entity
-----------------------------------
(Printed Name)                              By:
                                                --------------------------------
                                                Name:
                                                      --------------------------
                                                Title:
                                                      --------------------------

Address:                                    Address:

-----------------------------------         -----------------------------------

-----------------------------------         -----------------------------------

-----------------------------------         -----------------------------------

Aggregate dollar amount of shares of Common Stock committed to be purchased
pursuant to the terms of the Agreement:

[Insert dollar amount] $___________________ (the "Investment Amount").


                                                             Page 40 of 70 Pages

                                   SCHEDULE I

                                    Investors

------------------------ --------------------  -----------------  --------------
          Name            Number of Shares of     Number of         Aggregate
     of Investor             Common Stock      Investor Warrants  Purchase Price
------------------------ --------------------  -----------------  --------------

Fax:
Phone:

------------------------ --------------------  -----------------  --------------

Fax:
Phone:

------------------------ --------------------  -----------------  --------------

------------------------ --------------------  -----------------  --------------


                                                             Page 41 of 70 Pages

                                   EXHIBIT 10
                                   ----------

THIS  WARRANT  HAS NOT BEEN  REGISTERED  UNDER THE  SECURITIES  ACT OF 1933,  AS
AMENDED, OR THE SECURITIES LAWS OF ANY STATE AND MAY NOT BE SOLD, TRANSFERRED OR
OTHERWISE DISPOSED OF EXCEPT PURSUANT TO AN EFFECTIVE  REGISTRATION STATEMENT OR
EXEMPTION FROM REGISTRATION UNDER THE FOREGOING LAWS.

THIS WARRANT  SHALL BE VOID  AFTER 5:00 P.M.  EASTERN  TIME ON MAy 13, 2004 (THE
"EXPIRATION DATE").

No. ____

                               BIOENVISION, INC.

                 WARRANT TO PURCHASE [insert number] SHARES OF
                    COMMON STOCK, PAR VALUE $0.001 PER SHARE

          FOR VALUE  RECEIVED,  [insert  holder's  name]  ("Warrantholder"),  is
entitled  to  purchase,   subject  to  the  provisions  of  this  Warrant,  from
Bioenvision,  Inc., a Delaware  corporation  ("Company"),  at any time not later
than 5:00  P.M.,  Eastern  time,  on the  Expiration  Date (as  defined  above),
one-fifth  of a share of  Common  Stock,  at an  exercise  price  of $7.50  (the
exercise  price in effect being  herein  called the  "Warrant  Price"),  [insert
number]  shares  ("Warrant  Shares") of the Company's  Common  Stock,  par value
$0.001 per share ("Common Stock"). The number of Warrant Shares purchasable upon
exercise of this  Warrant and the Warrant  Price shall be subject to  adjustment
from time to time as  described  herein.  Capitalized  terms used herein and not
defined have the  respective  meanings  given to them in that  certain  Purchase
Agreement,  dated the date hereof, by and among the Company,  the holder and the
other parties named therein.

     Section 1. Registration.  The Company shall maintain books for the transfer
and registration of the Warrant.  Upon the initial issuance of this Warrant, the
Company shall issue and register the Warrant in the name of the Warrantholder.

     Section  2.  (a)  Transfers.  As  provided  herein,  this  Warrant  may  be
transferred only pursuant to a registration statement filed under the Securities
Act of 1933,  as amended  (the  "Securities  Act"),  or an  exemption  from such
registration.  Subject to such  restrictions,  the Company  shall  transfer this
Warrant  from time to time upon the books to be  maintained  by the  Company for
that  purpose,   upon  surrender  thereof  for  transfer  properly  endorsed  or
accompanied by appropriate instructions for transfer and such other documents as
may be  reasonably  required  by the  Company,  including,  if  required  by the
Company,  an opinion of its counsel to the effect  that such  transfer is exempt
from the registration requirements of the Securities Act, to establish that such
transfer is being made in accordance  with the terms  hereof,  and a new Warrant
shall be issued to the transferee and the surrendered  Warrant shall be canceled
by the Company.

          (b) Division and  Combination;  Expenses;  Books.  This Warrant may be
divided  or  combined  with  other  Warrants  upon  presentation  hereof  at the
aforesaid  office or  agency  of the  Company,  together  with a written  notice
specifying the names and  denominations  in which new Warrants are to be issued,
signed by the Warrantholder or its agent or attorney. Subject to compliance with
Section  2(a) as to any  transfer  which may be  involved  in such  division  or
combination,  the Company shall execute and deliver a new Warrant or Warrants in
exchange  for the Warrant or  Warrants  to be divided or combined in  accordance
with such notice. Subject to the foregoing, the Company shall prepare, issue and
deliver at its own expense the new Warrant or Warrants  under this Section 2(b).
The Company agrees to maintain, at its aforesaid office or agency, books for the
registration and the registration of transfer of the Warrants.

     Section 3. Exercise of Warrant.

          (a) Subject to the provisions  hereof,  the Warrantholder may exercise
this  Warrant  in  whole or in part at any time  prior  to its  expiration  upon
surrender of the Warrant,  together with  delivery of the duly executed  Warrant
exercise  form  attached  hereto as Appendix A (the  "Exercise  Agreement")  and
payment by cash,  certified  check or wire  transfer of funds for the  aggregate
Warrant  Price for that number of Warrant  Shares then being  purchased,  to the
Company  during  normal  business  hours on any  business  day at the  Company's
principal executive offices (or such other office or agency of the Company as it
may designate by notice to the holder  hereof).  The Warrant Shares so purchased
shall be deemed to be issued to the holder hereof or such holder's designee,  as
the record  owner of such  shares,  as of the close of  business  on the date on
which this Warrant shall have been  surrendered  (or evidence of loss,  theft or
destruction thereof and security or indemnity  satisfactory to the Company), the
Warrant Price shall have been paid and the completed  Exercise  Agreement  shall


                                                             Page 42 of 70 Pages

have  been  delivered.   Certificates  for  the  Warrant  Shares  so  purchased,
representing the aggregate number of shares specified in the Exercise Agreement,
shall be delivered to the holder hereof within a reasonable  time, not exceeding
three (3) business  days,  after this Warrant shall have been so exercised.  The
certificates so delivered shall be in such  denominations as may be requested by
the holder  hereof and shall be  registered  in the name of such  holder or such
other name as shall be  designated  by such holder.  If this Warrant  shall have
been exercised only in part, then, unless this Warrant has expired,  the Company
shall, at its expense, at the time of delivery of such certificates,  deliver to
the holder a new Warrant representing the number of shares with respect to which
this  Warrant  shall not then have been  exercised.  As used in this  Agreement,
"business day" means a day,  other than a Saturday or Sunday,  on which banks in
New York City are open for the general transaction of business.

          (b) Notwithstanding anything herein to the contrary, in no event shall
the  Warrantholder be entitled to exercise any portion of this Warrant in excess
of that portion of this Warrant upon exercise of which the sum of (1) the number
of  shares of  Common  Stock  beneficially  owned by the  Warrantholder  and its
Affiliates  (other than shares of Common Stock which may be deemed  beneficially
owned  through the  ownership of the  unexercised  portion of the Warrant or the
unexercised  or unconverted  portion of any other security of the  Warrantholder
subject to a limitation on  conversion  analogous to the  limitations  contained
herein) and (2) the number of shares of Common Stock  issuable upon the exercise
of the portion of this Warrant with respect to which the  determination  of this
proviso is being made, would result in beneficial ownership by the Warrantholder
and its Affiliates of more than 9.99% of the then  outstanding  shares of Common
Stock.  As used herein,  the term  "Affiliate"  means any person or entity that,
directly  or  indirectly  through  one or more  intermediaries,  controls  or is
controlled by or is under common control with a person or entity,  as such terms
are used in and construed  under Rule 144 under the Securities Act. For purposes
of the proviso to the immediately preceding sentence, beneficial ownership shall
be determined in accordance with Section 13(d) of the Securities Exchange Act of
1934, as amended (the "Exchange Act"), and Regulations 13D-G thereunder,  except
as otherwise provided in clause (1) of such proviso. The Warrantholder may waive
the  limitations  set forth herein by sixty-one  (61) days written notice to the
Company.

     Section 4.  Compliance  with the  Securities  Act of 1933.  The Company may
cause the legend set forth on the first page of this  Warrant to be set forth on
each Warrant or similar legend on any security  issued or issuable upon exercise
of this Warrant, unless counsel for the Company is of the opinion as to any such
security that such legend is unnecessary.

     Section 5.  Payment of Taxes.  The Company will pay any  documentary  stamp
taxes  attributable to the initial  issuance of Warrant Shares issuable upon the
exercise  of the  Warrant;  provided,  however,  that the  Company  shall not be
required to pay any tax or taxes which may be payable in respect of any transfer
involved in the issuance or delivery of any certificates for Warrant Shares in a
name  other  than that of the  registered  holder of this  Warrant in respect of
which  such  shares  are  issued,  and in such case,  the  Company  shall not be
required to issue or deliver any  certificate  for Warrant Shares or any Warrant
until the person  requesting the same has paid to the Company the amount of such
tax or has established to the Company's  reasonable  satisfaction  that such tax
has been  paid.  The holder  shall be  responsible  for  income  taxes due under
federal, state or other law, if any such tax is due.

     Section 6.  Mutilated or Missing  Warrants.  In case this Warrant  shall be
mutilated,  lost, stolen, or destroyed,  the Company shall issue in exchange and
substitution of and upon  cancellation of the mutilated  Warrant,  or in lieu of
and  substitution  for the Warrant lost,  stolen or destroyed,  a new Warrant of
like tenor and for the  purchase  of a like number of Warrant  Shares,  but only
upon receipt of evidence  reasonably  satisfactory  to the Company of such loss,
theft or  destruction  of the  Warrant,  and with  respect to a lost,  stolen or
destroyed  Warrant,  reasonable  indemnity  or bond  with  respect  thereto,  if
requested by the Company.

                                                             Page 43 of 70 Pages

     Section 7. Reservation of Common Stock.  The Company hereby  represents and
warrants that there have been reserved,  and the Company shall at all applicable
times keep reserved until issued (if necessary) as  contemplated by this Section
7, out of the authorized and unissued shares of Common Stock,  sufficient shares
to provide  for the  exercise  of the  rights of  purchase  represented  by this
Warrant.  The Company agrees that all Warrant Shares issued upon due exercise of
the  Warrant  shall be, at the time of  delivery  of the  certificates  for such
Warrant Shares, duly authorized,  validly issued,  fully paid and non-assessable
shares of Common  Stock of the  Company and not  subject to  preemptive  rights.
Before  taking any action which would cause an  adjustment  reducing the Warrant
Price below the then par value,  if any, of the shares of Common Stock  issuable
upon exercise of the Warrants, the Company shall take any corporate action which
may be necessary  in order that the Company may validly and legally  issue fully
paid and  non-assessable  shares of such Common Stock at such  adjusted  Warrant
Price.

     Section 8.  Adjustments.  Subject and  pursuant to the  provisions  of this
Section  8, the  Warrant  Price and  number of  Warrant  Shares  subject to this
Warrant  shall  be  subject  to  adjustment  from  time  to  time  as set  forth
hereinafter.

          (a) If the Company shall,  at any time or from time to time while this
Warrant is  outstanding,  pay a dividend  or make a  distribution  on its Common
Stock in shares of Common  Stock,  subdivide  its  outstanding  shares of Common
Stock  into a greater  number of shares or  combine  its  outstanding  shares of
Common Stock into a smaller number of shares or issue by reclassification of its
outstanding  shares of Common Stock any shares of its capital  stock  (including
any such  reclassification in connection with a consolidation or merger in which
the Company is the  continuing  corporation),  then the number of Warrant Shares
purchasable  upon  exercise  of the  Warrant  and the  Warrant  Price in  effect
immediately  prior to the date upon which such change  shall  become  effective,
shall be adjusted by the Company so that the Warrantholder thereafter exercising
the Warrant shall be entitled to receive the number of shares of Common Stock or
other capital stock which the  Warrantholder  would have received if the Warrant
had been fully  exercised  immediately  prior to such  event  upon  payment of a
Warrant  Price  that has been  adjusted  to  reflect  a fair  allocation  of the
economics of such event to the  Warrantholder.  Such  adjustments  shall be made
successively whenever any event listed above shall occur.

          (b) If any  capital  reorganization,  reclassification  of the capital
stock of the  Company,  consolidation  or merger  of the  Company  with  another
corporation in which the Company is not the survivor, or sale, transfer or other
disposition  of all or  substantially  all of the  Company's  assets to  another
corporation  shall be effected,  then, the Company shall use its best efforts to
ensure  that  lawful  and  adequate   provision   shall  be  made  whereby  each
Warrantholder  shall  thereafter have the right to purchase and receive upon the
basis and upon the  terms and  conditions  herein  specified  and in lieu of the
Warrant Shares  immediately  theretofore  issuable upon exercise of the Warrant,
such  shares of stock,  securities  or assets  as would  have been  issuable  or
payable with  respect to or in exchange for a number of Warrant  Shares equal to
the number of Warrant Shares immediately  theretofore  issuable upon exercise of
the Warrant, had such reorganization,  reclassification,  consolidation, merger,
sale,  transfer  or other  disposition  not  taken  place,  and in any such case
appropriate  provision shall be made with respect to the rights and interests of
each  Warrantholder to the end that the provisions  hereof  (including,  without
limitation,  provision for adjustment of the Warrant Price) shall  thereafter be
applicable, as nearly equivalent as may be practicable in relation to any shares
of stock, securities or assets thereafter deliverable upon the exercise thereof.
The Company shall not effect any such consolidation,  merger,  sale, transfer or
other  disposition  unless  prior to or  simultaneously  with  the  consummation
thereof the successor  corporation  (if other than the Company)  resulting  from
such  consolidation  or  merger,  or the  corporation  purchasing  or  otherwise
acquiring  such assets or other  appropriate  corporation or entity shall assume
the  obligation to deliver to the holder of the Warrant,  at the last address of
such  holder  appearing  on the  books of the  Company,  such  shares  of stock,
securities  or assets as, in  accordance  with the  foregoing  provisions,  such
holder  may be  entitled  to  purchase,  and the other  obligations  under  this
Warrant.  The  provisions  of  this  paragraph  (b)  shall  similarly  apply  to
successive reorganizations,  reclassifications,  consolidations, mergers, sales,
transfers or other dispositions.

                                                             Page 44 of 70 Pages

          (c) In case the Company  shall fix a payment  date for the making of a
distribution  to all holders of Common Stock  (including  any such  distribution
made in connection  with a  consolidation  or merger in which the Company is the
continuing  corporation) of evidences of indebtedness or assets (other than cash
dividends or cash distributions  payable out of consolidated  earnings or earned
surplus  or  dividends  or  distributions  referred  to  in  Section  8(a)),  or
subscription  rights or warrants,  the Warrant  Price to be in effect after such
payment date shall be  determined  by  multiplying  the Warrant  Price in effect
immediately  prior to such  payment date by a fraction,  the  numerator of which
shall be the total number of shares of Common Stock  outstanding  multiplied  by
the Market Price (as defined below) per share of Common Stock  immediately prior
to such payment date, less the fair market value (as determined by the Company's
Board of Directors in good faith) of said assets or evidences of indebtedness so
distributed,  or of such subscription rights or warrants, and the denominator of
which shall be the total number of shares of Common Stock outstanding multiplied
by such Market Price per share of Common Stock immediately prior to such payment
date.  "Market Price" as of a particular date (the "Valuation  Date") shall mean
the  following:  (p) if the  Common  Stock is then  listed on a  national  stock
exchange,  the  Market  Price  shall be the  closing  sale price of one share of
Common  Stock on such  exchange on the last  trading day prior to the  Valuation
Date,  provided  that if such stock has not traded in the prior ten (10) trading
sessions,  the Market Price shall be the average  closing  price of one share of
Common  Stock in the most  recent ten (10)  trading  sessions  during  which the
Common Stock has traded;  (q) if the Common Stock is then included in The Nasdaq
Stock Market, Inc. ("Nasdaq"),  the Market Price shall be the closing sale price
of one share of Common  Stock on  Nasdaq  on the last  trading  day prior to the
Valuation  Date or, if no such closing sale price is  available,  the average of
the high bid and the low ask  price  quoted  on Nasdaq as of the end of the last
trading day prior to the  Valuation  Date,  provided  that if such stock has not
traded in the prior ten (10)  trading  sessions,  the Market  Price shall be the
average  closing  price of one share of Common Stock in the most recent ten (10)
trading  sessions  during which the Common  Stock has traded;  (s) if the Common
Stock is then included in the Over-the-Counter  Bulletin Board, the Market Price
shall  be  the  closing  sale  price  of  one  share  of  Common  Stock  on  the
Over-the-Counter  Bulletin  Board on the last trading day prior to the Valuation
Date or, if no such closing sale price is available, the average of the high bid
and the low ask price quoted on the  Over-the-Counter  Bulletin  Board as of the
end of the last trading day prior to the Valuation  Date,  provided that if such
stock has not traded in the prior ten (10)  trading  sessions,  the Market Price
shall be the  average  closing  price of one share of  Common  Stock in the most
recent ten (10) trading  sessions during which the Common Stock has traded,  (t)
if the Common  Stock is then  included in the "pink  sheets,"  the Market  Price
shall be the  closing  sale  price of one  share of  Common  Stock on the  "pink
sheets"  on the last  trading  day  prior to the  Valuation  Date or, if no such
closing  sale price is  available,  the  average of the high bid and the low ask
price quoted on the "pink sheets" as of the end of the last trading day prior to
the Valuation Date,  provided that if such stock has not traded in the prior ten
(10) trading  sessions,  the Market Price shall be the average  closing price of
one share of Common  Stock in the most recent ten (10) trading  sessions  during
which the Common Stock has traded.  The Board of Directors of the Company  shall
respond promptly,  in writing,  to an inquiry by the Warrantholder  prior to the
exercise  hereunder  as to the  Market  Price  of a share  of  Common  Stock  as
determined by the Board of Directors of the Company.

          (d) In the event that, as a result of an  adjustment  made pursuant to
this Section 8, the holder of this Warrant shall become  entitled to receive any
shares of capital stock of the Company  other than shares of Common  Stock,  the
number of such other shares so receivable upon exercise of this Warrant shall be
subject  thereafter to adjustment  from time to time in a manner and on terms as
nearly  equivalent as practicable to the provisions  with respect to the Warrant
Shares contained in this Warrant.

                                                             Page 45 of 70 Pages

          (e) Other Action  Affecting  Common Stock. In case at any time or from
time to time the Company  shall take any action in respect of its Common  Stock,
other than the payment of  dividends  permitted by Section 8 or any other action
described  in Section 8, then,  unless such  action  will not have a  materially
adverse  effect  upon the  rights of the holder of this  Warrant,  the number of
shares of Common  Stock or other  stock into which this  Warrant is  exercisable
and/or the  purchase  price  thereof  shall be adjusted in such manner as may be
equitable in the circumstances.

          (f)  Certain  Limitations.  Notwithstanding  anything  herein  to  the
contrary,  the Company agrees not to enter into any transaction which, by reason
of any adjustment  hereunder,  would cause the Current  Warrant Price to be less
than the par value per share of Common Stock.

     Section 9. Fractional Interest.  The Company shall not be required to issue
fractions of Warrant Shares upon the exercise of this Warrant. If any fractional
share of Common Stock would,  except for the provisions of the first sentence of
this Section 9, be  deliverable  upon such  exercise,  the  Company,  in lieu of
delivering such  fractional  share,  shall pay to the exercising  holder of this
Warrant an amount in cash equal to the Market Price of such fractional  share of
Common Stock on the date of exercise.

     Section 10.  Benefits.  Nothing in this Warrant  shall be construed to give
any person,  firm or corporation  (other than the Company and the Warrantholder)
any legal or equitable right, remedy or claim, it being agreed that this Warrant
shall  be  for  the  sole  and   exclusive   benefit  of  the  Company  and  the
Warrantholder.

     Section 11. Notices to Warrantholders.

          11.1  Certificate  as to  Adjustments.  Upon  the  occurrence  of each
adjustment or  readjustment of the Current  Warrant Price,  the Company,  at its
expense,  shall promptly  compute such  adjustment or readjustment in accordance
with the terms  hereof and prepare  and furnish to the holder of this  Warrant a
certificate  setting forth such adjustment or readjustment and showing in detail
the facts upon which such  adjustment  or  readjustment  is based.  The  Company
shall,  upon the  written  request  at any time of the  holder of this  Warrant,
furnish or cause to be furnished to such holder a like certificate setting forth
(i) such  adjustments and  readjustments,  (ii) the Current Warrant Price at the
time in effect and (iii) the number of shares of Common Stock and the amount, if
any, or other  property which at the time would be received upon the exercise of
Warrants owned by such holder.

          11.2. Notice of Corporate Action.

          If at any time:

          (a) the Company shall take a record of the holders of its Common Stock
for the  purpose of  entitling  them to receive a  dividend  (other  than a cash
dividend  payable out of earnings or earned  surplus  legally  available for the
payment of dividends under the laws of the  jurisdiction of incorporation of the
Company) or other  distribution,  or any right to subscribe  for or purchase any
evidences  of its  indebtedness,  any  shares of stock of any class or any other
securities or property, or to receive any other right, or

          (b) there  shall be any capital  reorganization  of the  Company,  any
reclassification  or recapitalization of the capital stock of the Company or any
consolidation  or merger of the  Company  with,  or any sale,  transfer or other
disposition of all or substantially all the property,  assets or business of the
Company to, another corporation, or

                                                             Page 46 of 70 Pages

          (c) there shall be a voluntary or involuntary dissolution, liquidation
or winding up of the Company; or

          (d) the  Company  shall  cause the  holders of its Common  Stock to be
entitled to receive (i) any  dividend or other  distribution  of cash,  (ii) any
evidences of its indebtedness,  or (iii) any shares of stock of any class or any
other securities or property or assets of any nature whatsoever (other than cash
or additional shares of Common Stock as provided in Section 4.1 hereof); or (iv)
any warrants or other rights to subscribe  for or purchase any  evidences of its
indebtedness,  any  shares  of stock of any  class or any  other  securities  or
property or assets of any nature whatsoever;

then, in any one or more of such cases, the Company shall give to the holder (i)
at least ten (10) days' prior written  notice of the date on which a record date
shall be selected for such dividend,  distribution  or right or for  determining
rights to vote in respect of any such reorganization,  reclassification, merger,
consolidation, sale, transfer, disposition,  dissolution, liquidation or winding
up, and (ii) in the case of any such reorganization,  reclassification,  merger,
consolidation, sale, transfer, disposition,  dissolution, liquidation or winding
up, at least fifteen (15) days' prior  written  notice of the date when the same
shall take place. Such notice in accordance with the foregoing clause also shall
specify  (i) the date on which any such record is to be taken for the purpose of
such dividend,  distribution  or right,  the date on which the holders of Common
Stock shall be entitled to any such  dividend,  distribution  or right,  and the
amount   and   character   thereof,   and  (ii)  the  date  on  which  any  such
reorganization,   reclassification,   merger,  consolidation,   sale,  transfer,
disposition,  dissolution,  liquidation  or  winding up is to take place and the
time,  if any such time is to be fixed,  as of which the holders of Common Stock
shall be entitled to exchange  their  shares of Common Stock for  securities  or
other property deliverable upon such reorganization,  reclassification,  merger,
consolidation, sale, transfer, disposition,  dissolution, liquidation or winding
up. Each such  written  notice shall be  sufficiently  given if addressed to the
holder at the last  address of the holder  appearing on the books of the Company
and delivered in accordance with Section 13.

          11.3 Notices of Adjustments. Upon the happening of any event requiring
an adjustment  of the Warrant  Price,  the Company  shall  promptly give written
notice thereof to the  Warrantholder at the address  appearing in the records of
the Company,  stating the  adjusted  Warrant  Price and the  adjusted  number of
Warrant Shares resulting from such event and setting forth in reasonable  detail
the method of  calculation  and the facts upon which such  calculation is based.
Failure to give such notice to the Warrantholder or any defect therein shall not
affect the legality or validity of the subject adjustment.

          Section 12.  Identity of Transfer  Agent.  The Transfer  Agent for the
Common Stock is Liberty  Transfer  Co. Upon the  appointment  of any  subsequent
transfer  agent for the Common  Stock or other shares of the  Company's  capital
stock  issuable upon the exercise of the rights of purchase  represented  by the
Warrant,  the Company will mail to the  Warrantholder a statement  setting forth
the name and address of such transfer agent.

          Section 13. Notices. Unless otherwise provided, any notice required or
permitted  under  this  Warrant  shall be given in  writing  and shall be deemed
effectively  given as hereinafter  described (i) if given by personal  delivery,
then such  notice  shall be deemed  given upon such  delivery,  (ii) if given by
telex or  facsimile,  then such  notice  shall be deemed  given upon  receipt of
confirmation of complete  transmittal,  (iii) if given by mail, then such notice
shall be deemed  given  upon the  earlier of (A)  receipt of such  notice by the
recipient  or (B) three days after such notice is deposited in first class mail,
postage prepaid,  and (iv) if given by an internationally  recognized  overnight
air courier,  then such notice  shall be deemed given one day after  delivery to
such  carrier.   All  notices   shall  be  addressed  as  follows:   if  to  the
Warrantholder,  at its address as set forth in the  Company's  books and records
and, if to the Company,  at the address as follows,  or at such other address as
the  Warrantholder  or the Company may  designate by ten days'  advance  written
notice to the other:

                     If to the Company:

                              Bioenvision, Inc.
                              509 Madison Avenue, Suite 404
                              New York, NY  10022
                              Attention:  David P. Luci
                              Fax:  212-750-6777

                                                             Page 47 of 70 Pages

                     With a copy to:

                              Paul, Hastings, Janofsky & Walker LLP
                              75 East 55th Street
                              New York, NY  10022
                              Attention:  Luke P. Iovine, III, Esq.
                              Fax: 212-319-4090

     Section 14.  Registration  Rights.  The initial  holder of this  Warrant is
entitled  to the  benefit of certain  registration  rights  with  respect to the
shares of Common Stock issuable upon the exercise of this Warrant as provided in
the Registration  Rights  Agreement,  and any subsequent  holder hereof shall be
entitled  to such  rights to the  extent  provided  in the  Registration  Rights
Agreement.

     Section 15.  Successors.  All the covenants and provisions hereof by or for
the  benefit of the  Warrantholder  shall  bind and inure to the  benefit of its
respective successors and assigns hereunder.

     Section 16. Governing Law. This Warrant shall be governed by, and construed
in  accordance  with,  the  internal  laws of the  State  of New  York,  without
reference to the choice of law provisions thereof. The Company and, by accepting
this  Warrant,  the  Warrantholder,  each  irrevocably  submits to the exclusive
jurisdiction  of the courts of the State of New York  located in New York County
and the United States  District Court for the Southern  District of New York for
the purpose of any suit,  action,  proceeding or judgment relating to or arising
out of this Warrant and the transactions contemplated hereby. Service of process
in connection  with any such suit,  action or  proceeding  may be served on each
party hereto  anywhere in the world by the same methods as are specified for the
giving of notices  under this  Warrant.  The  Company  and,  by  accepting  this
Warrant, the Warrantholder, each irrevocably consents to the jurisdiction of any
such court in any such suit,  action or proceeding and to the laying of venue in
such court. The Company and, by accepting this Warrant, the Warrantholder,  each
irrevocably waives any objection to the laying of venue of any such suit, action
or proceeding  brought in such courts and irrevocably  waives any claim that any
such suit, action or proceeding brought in any such court has been brought in an
inconvenient forum.

     Section  17.  No  Rights  as  Shareholder.  Prior to the  exercise  of this
Warrant,  the  Warrantholder  shall  not  have  or  exercise  any  rights  as  a
shareholder of the Company by virtue of its ownership of this Warrant.

     Section 18.  Cashless  Exercise.  Notwithstanding  anything to the contrary
contained herein, the Warrantholder may elect to receive, without the payment by
the  Warrantholder  of the  aggregate  Warrant Price in respect of the shares of
Common Stock to be acquired upon exercise  hereof,  shares of Common Stock equal
to the value of this Warrant or any portion hereof being  exercised  pursuant to
this  Section  18 by the  surrender  of this  Warrant  (or such  portion of this
Warrant being so exercised)  together with the Net Issue Election Notice annexed
hereto as Appendix B duly executed, at the office of the Company. Thereupon, and
in no event later than three business days after the Company  receipt of the Net
Issue   Election   Notice,   the  Company  shall  issue  to  the   Warrantholder
certificate(s)  for such number of fully paid,  validly issued and nonassessable
shares of Common Stock as is computed using the formula  immediately  below. The
certificates so delivered shall be in such  denominations as may be requested by
the holder  hereof and shall be  registered  in the name of such  holder or such
other name as shall be  designated  by such holder.  If this Warrant  shall have
been exercised only in part, then, unless this Warrant has expired,  the Company
shall, at its expense, at the time of delivery of such certificates,  deliver to
the holder a new Warrant representing the number of shares with respect to which
this Warrant shall not then have been exercised.

                                  X = Y (A - B)
                                  -------------
                                        A
where

                                                             Page 48 of 70 Pages

               X = the  number of  shares  of  Common  Stock to be issued to the
Warrantholder upon exercise of this Warrant pursuant to this Section 18;

               Y = the total  number of shares of Common  Stock  covered by this
Warrant  which the  Warrantholder  has  surrendered  at such  time for  cashless
exercise  (including both shares to be issued to the Warrantholder and shares to
be canceled as payment therefor);

               A = the Market  Price of one share of Common Stock as at the time
the net issue election is made; and

               B = the Warrant  Price in effect  under this  Warrant at the time
the net issue election is made.

               The Warrant  Shares  issued  pursuant to this Section 18 shall be
deemed to be issued to the exercising holder or such holder's  designee,  as the
record  owner of such  shares,  as of the close of business on the date on which
the Net Issue Election Notice shall have been  surrendered (or evidence of loss,
theft or  destruction  thereof and  security or  indemnity  satisfactory  to the
Company) to the Company.

          Section  19.  Office of the  Company.  As long as any of the  Warrants
remain outstanding, the Company shall maintain an office or agency (which may be
the  principal  executive  offices of the  Company)  where the  Warrants  may be
presented for exercise,  registration  of transfer,  division or  combination as
provided in this Warrant.

          Section 20.  Registration  Rights.  The resale of the  Warrant  Shares
shall be  registered in accordance  with the terms and  conditions  contained in
that certain  Registration Rights Agreement dated of even date hereof, among the
original holder of this Warrant, the Company and the other parties named therein
(the "Registration  Rights Agreement").  The holder of this Warrant acknowledges
that pursuant to the Registration Rights Agreement, the Company has the right to
request  that the  holder  furnish  information  regarding  such  holder and the
distribution of the Warrant Shares as is required by law or the Commission to be
disclosed  in the  Registration  Statement  (as  such  term  is  defined  in the
Registration   Rights  Agreement),   and  the  Company  may  exclude  from  such
registration the Warrant Shares acquirable  hereunder if holder fails to furnish
such  information  within  a  reasonable  time  prior  to  the  filing  of  each
Registration Statement,  supplemented prospectus included therein and/or amended
Registration Statement.

          Section 21. Amendments.  This Warrant shall not be amended without the
prior written consent of the Company and the then current Warrantholder.

          Section 22. Section Headings. The section headings in this Warrant are
for the  convenience of the Company and the  Warrantholder  and in no way alter,
modify, amend, limit or restrict the provisions hereof.

                            [Signature Page Follows]



                                                             Page 49 of 70 Pages

         IN WITNESS WHEREOF, the Company has caused this Warrant to be duly
executed, as of the 13th day of May, 2004.

                              BIOENVISION, INC.



                              By:
                                 -----------------------------------------
                                 Name: Christopher B. Wood, M.D.
                                 Title: Chief Executive Officer



                                                             Page 50 of 70 Pages

                                   APPENDIX A
                                BIOENVISION, INC.
                              WARRANT EXERCISE FORM

To: Bioenvision, Inc.

     The undersigned hereby irrevocably elects to exercise the right of purchase
represented by the within Warrant ("Warrant") for, and to purchase thereunder by
the payment of the Warrant Price and surrender of the Warrant, _______________
shares of Common Stock ("Warrant Shares") provided for therein, and requests
that certificates for the Warrant Shares be issued as follows:

                           -------------------------------
                           Name

                           --------------------------------
                           Address

                           --------------------------------

                           --------------------------------
                           Federal Tax ID or SSN

     and delivered by

                  |_|     certified mail to the above address, or
                  |_|     electronically (provide DWAC Instructions:_______), or
                  |_|     other (specify: ____________________________________).

and, if the number of Warrant Shares shall not be all the Warrant Shares
purchasable upon exercise of the Warrant, that a new Warrant for the balance of
the Warrant Shares purchasable upon exercise of this Warrant be registered in
the name of the undersigned Warrantholder or the undersigned's Assignee as below
indicated and delivered to the address stated below.

Dated: ___________________, ______          Signature:______________________

Note:  The signature must correspond
with the name of the registered holder            ------------------------------
as written on the first page of                   Name (please print)
the Warrant in every particular,
without alteration or enlargement                 ------------------------------
or any change whatever, unless the Warrant        Address
has been assigned.
                                                  ------------------------------
                                                  Federal Tax ID or SSN

                                                  Assignee:

                                                 -------------------------------
                                                 -------------------------------
                                                 -------------------------------


                                                             Page 51 of 70 Pages



                                   APPENDIX B
                                BIOENVISION, INC.
                            NET ISSUE ELECTION NOTICE


To: Bioenvision, Inc.

Date:_________________________


     The undersigned hereby elects under Section 18 of this Warrant to surrender
the right to purchase ____________ shares of Common Stock pursuant to this
Warrant and hereby requests the issuance of _____________ shares of Common
Stock. The certificate(s) for the shares issuable upon such net issue election
shall be issued in the name of the undersigned or as otherwise indicated below.


     -----------------------------------------
     Signature

     -----------------------------------------
     Name for Registration

     -----------------------------------------
     Mailing Address










                                                             Page 52 of 70 Pages

                                   EXHIBIT 11
                                   ----------

                          REGISTRATION RIGHTS AGREEMENT

     This  Registration  Rights Agreement (the  "Agreement") is made and entered
into as of this __ day of May, 2004, by and among Bioenvision,  Inc., a Delaware
corporation  (the  "Company"),  the "Investors"  named in that certain  Purchase
Agreement,  dated May __, 2004, by and among the Company and the Investors  (the
"Purchase  Agreement"),  and SCO Securities  LLC, a Delaware  limited  liability
company (the "Placement Agent").  Capitalized terms not otherwise defined herein
shall have the meanings ascribed thereto in the Purchase Agreement.

     The parties hereby agree as follows:

     1. Certain Definitions.

     As used in this  Agreement,  the  following  terms shall have the following
meanings:

     "Affiliate" shall mean, with respect to any person,  any other person which
directly or indirectly  Controls,  is Controlled  by, or is under common Control
with, such person.

     "Business Day" shall mean a day, other than a Saturday or Sunday,  on which
banks in New York City are open for the general transaction of business.

     "Common Stock" shall mean the Company's  common stock, par value $0.001 per
share,   and  any  securities   into  which  such  shares  may   hereinafter  be
reclassified.

     "Control" means the possession,  direct or indirect, of the power to direct
or cause the  direction  of the  management  and  policies of a person,  whether
through the ownership of voting securities, by contract or otherwise.

     "Holders"  shall mean the Investors,  the Placement Agent and any permitted
transferee  thereof who is a subsequent  holder of any  Warrants,  the Placement
Agent Warrants or Registrable Securities.

     "Investors" shall mean the Investors identified in the Purchase Agreement.

     "Placement     Agent     Counsel"    means    Wiggin    and    Dana    LLP.

     "Prospectus"  shall  mean  the  prospectus  included  in  any  Registration
Statement, as amended or supplemented by any prospectus supplement, with respect
to the  terms of the  offering  of any  portion  of the  Registrable  Securities
covered  by  such  Registration  Statement  and  by  all  other  amendments  and
supplements  to the  prospectus,  including  post-effective  amendments  and all
material incorporated by reference in such prospectus.

     "Register," "registered" and "registration" refer to a registration made by
preparing and filing a Registration  Statement or similar document in compliance
with the  1933 Act (as  defined  below),  and the  declaration  or  ordering  of
effectiveness of such Registration Statement or document.


                                                             Page 53 of 70 Pages


     Registrable  Securities"  means  (a)  the  Shares  and the  Warrant  Shares
(without  regard to any  limitations  on beneficial  ownership  contained in the
Purchase  Agreement or Warrants) or other securities  issued or issuable to each
Purchaser or its  transferee or designee (i) upon  exercise of the Warrants,  or
(ii) upon any distribution  with respect to, any exchange for or any replacement
of such  Shares or Warrant  Shares or (iii)  upon any  conversion,  exercise  or
exchange of any  securities  issued in  connection  with any such  distribution,
exchange or replacement; (b) securities issued or issuable upon any stock split,
stock dividend, recapitalization or similar event with respect to the foregoing;
and (c) any other  security  issued as a  dividend  or other  distribution  with
respect to, in exchange for, in replacement or redemption of, or in reduction of
the  liquidation  value of, any of the  securities  referred to in the preceding
clauses;  provided,  however, that such securities shall cease to be Registrable
Securities  when such securities have been sold to or through a broker or dealer
or underwriter in a public  distribution or a public  securities  transaction or
when such  securities  may be sold  without  any  restriction  pursuant  to Rule
144(k).

     "Registration Statement" shall mean any registration statement of the
Company filed under the 1933 Act that covers the resale of any of the
Registrable Securities pursuant to the provisions of this Agreement, amendments
and supplements to such Registration Statement, including post-effective
amendments, and all exhibits and all material incorporated by reference in such
Registration Statement.

     "SEC" shall mean the U.S. Securities and Exchange Commission.

     "1933 Act" shall mean the Securities Act of 1933, as amended, and the rules
and regulations promulgated thereunder.

     "1934 Act" shall mean the Securities Exchange Act of 1934, as amended,  and
the rules and regulations promulgated thereunder.

     2. Registration.

          (a) Registration Statements.

               (i)  Promptly  following  the closing of the purchase and sale of
the securities  contemplated by the Purchase Agreement (the "Closing Date"), but
in no event later than thirty (30) days  following the Closing Date (the "Filing
Deadline"),  the Company  shall  prepare and file with the SEC one  Registration
Statement on Form S-3 (or, if Form S-3 is not then available to the Company,  on
such  form  of  Registration   Statement  as  is  then  available  to  effect  a
registration for resale of the Registrable  Securities,  subject to the Holders'
consent),  covering  the  resale of all of the  Registrable  Securities  without
regard to any limitation on the exercise of the Warrants or the Placement  Agent
Warrants.  Such Registration Statement also shall cover, to the extent allowable
under the 1933 Act and the rules  promulgated  thereunder  (including Rule 416),
such  indeterminate  number of additional  shares of Common Stock resulting from
stock  splits,  stock  dividends  or similar  transactions  with  respect to the
Registrable  Securities.  The  Registration  Statement  (and each  amendment  or
supplement thereto, and each request for acceleration of effectiveness  thereof)
shall be provided in  accordance  with Section 3(c) to the Holders and Placement
Agent  Counsel not less than five (5) Business Days prior to its filing or other
submission.

               (ii)   Additional   Registrable   Securities.   If  at  any  time
Registrable  Securities  other  than the Shares and  Warrant  Shares  registered
pursuant to Section  2(a)(i) are issued or become  issuable,  the Company  shall
prepare and file with the SEC one or more  Registration  Statements  on Form S-3


                                                             Page 54 of 70 Pages

(or,  if  Form  S-3 is not  then  available  to the  Company,  on  such  form of
Registration  Statement as is then available to effect a registration for resale
of such additional  Registrable  Securities (the "Additional  Shares")) covering
the resale of the  Additional  Shares,  but only to the  extent  the  Additional
Shares are not at the time covered by an effective Registration Statement.  Such
Registration  Statement also shall cover, to the extent allowable under the 1933
Act  and  the  rules   promulgated   thereunder   (including   Rule  416),  such
indeterminate  number of additional  shares of Common Stock resulting from stock
splits,  stock dividends or similar  transactions with respect to the Additional
Shares.  The Registration  Statement (and each amendment or supplement  thereto,
and each request for acceleration of effectiveness thereof) shall be provided in
accordance  with Section 3(c) to the Holders and the Placement Agent Counsel not
less than 5 (five) Business Days prior to its filing or other submission.

          (b) Expenses.  All fees and expenses incident to the performance of or
compliance  with this  Agreement  by the  Company  shall be borne by the Company
whether or not the  Registration  Statement  is filed or becomes  effective  and
whether or not any Registrable  Securities are sold pursuant to the Registration
Statement.  The fees and expenses  referred to in the foregoing  sentence  shall
include,  without  limitation,  (i) all registration and filing fees (including,
without limitation, fees and expenses (A) with respect to filings required to be
made with each securities exchange, quotation system, market or over-the-counter
bulletin  board on which  Registrable  Securities  are required  hereunder to be
listed, (B) with respect to filings required to be made with the SEC, and (C) in
compliance  with  state  securities  or  Blue  Sky  laws   (including,   without
limitation,  reasonable and documented fees and disbursements of Placement Agent
Counsel in connection with Blue Sky qualifications of the Registrable Securities
and  determination  of  the  eligibility  of  the  Registrable   Securities  for
investment under the laws of such  jurisdictions as the Holders of a majority of
Registrable  Securities  may  designate)),  (ii) printing  expenses  (including,
without limitation, expenses of printing certificates for Registrable Securities
and of printing or photocopying  prospectuses),  (iii) messenger,  telephone and
delivery expenses,  (iv) 1933 Act liability insurance, if the Company so desires
such  insurance,  (v) fees and  expenses  of all other  Persons  retained by the
Company in connection with the consummation of the transactions  contemplated by
this Agreement,  including, without limitation, the Company's independent public
accountants (including, in the case of an underwritten offering, the expenses of
any comfort letters or costs associated with the delivery by independent  public
accountants of a comfort letter or comfort letters) and legal counsel,  and (vi)
reasonable  and documented  fees and expenses of the Placement  Agent Counsel in
connection with any Registration  Statement hereunder,  provided,  such fees and
expenses  do not  exceed  $10,000 in the  aggregate.  In  addition,  each of the
Investors,  the Placement  Agent and the Company shall be responsible for all of
their respective  internal expenses incurred in connection with the consummation
of  the  transactions   contemplated  by  this  Agreement  (including,   without
limitation,  all salaries and expenses of its officers and employees  performing
legal or  accounting  duties),  the  expense of any annual  audit,  the fees and
expenses  incurred in connection with the listing of the Registrable  Securities
on any securities exchange as required hereunder.

          (c) Effectiveness.

               (i) The Company  shall use  reasonable  best  efforts to have the
Registration Statement declared effective not later than the earlier to occur of
(y) sixty (60) days after the date of filing of such Registration  Statement, or
(z) five (5) Business Days  following  the Company's  receipt of oral or written
(whichever is first) notice from the SEC that the  Registration  Statement  will
not be "reviewed or not be subject to further review; provided,  however, if the
Registration  Statement  is not  declared  effective  within the time period set
forth above,  the Company shall continue to use its  reasonable  best efforts to
have  the  Registration   Statement  declared  effective  as  soon  as  possible
thereafter.

               (ii) For not more  than  thirty  (30)  consecutive  days or for a
total of not more than  sixty (60) days in any twelve  (12)  month  period,  the
Company may delay the disclosure of material non-public  information  concerning
the  Company  which the  Company  is not  otherwise  required  to  disclose,  by

                                                             Page 55 of 70 Pages

terminating or suspending effectiveness of any registration contemplated by this
Section 2, if the disclosure of such material  non-public  information  would be
required  by  such  registration  and at the  time  is  not,  in the  reasonable
determination of the Company's Board of Directors,  in the best interests of the
Company (an "Allowed  Delay");  provided,  that the Company  shall  promptly (a)
notify the  Holders in writing of the  existence  of (but in no event  shall the
Company be required to disclose to such Holder any of the facts or circumstances
regarding) material non-public  information giving rise to an Allowed Delay, and
(b) advise the  Holders  in  writing to cease all sales  under the  Registration
Statement until the end of the Allowed Delay.

          (d) Underwritten  Offering. If any offering pursuant to a Registration
Statement  filed  pursuant  to Section  2(a)  hereof  involves  an  underwritten
offering,  the Company shall have the right to select an  investment  banker and
manager to administer the offering,  which investment banker or manager shall be
reasonably satisfactory to a majority of the Holders.

3.  Company  Obligations.  The Company will use its  reasonable  best efforts to
effect the  registration  of the  Registrable  Securities in accordance with the
terms  hereof,  and  pursuant  thereto the Company  will,  as  expeditiously  as
possible:

          (a) use  its  reasonable  best  efforts  to  cause  such  Registration
Statement to become effective and to remain continuously  effective for a period
that  will  terminate  upon the  earlier  of (x) the date  when all  Registrable
Securities  covered by such  Registration  Statement  have been sold or (y) with
respect to any  Holder,  such time as all  Registrable  Securities  held by such
Holder  may be  sold  without  any  restriction  pursuant  to Rule  144(k)  (the
"Effectiveness Period");

          (b) prepare and file with the SEC on or prior to the Filing  Deadline,
a  Registration  Statement on Form S-3 (or if such form is not  available to the
Company  on  another  form  appropriate  for  such  registration  in  accordance
herewith) (which shall include a Plan of Distribution  substantially in the form
of Exhibit A attached  hereto),  and cause the Registration  Statement to become
effective and remain effective as provided herein;  provided,  however, that not
less  than  five (5)  Business  Days  prior to the  filing  of the  Registration
Statement or any related Prospectus or any amendment or supplement thereto,  the
Company shall (i) furnish to the  Placement  Agent  Counsel,  copies of all such
documents  proposed to be filed,  which documents (other than those incorporated
by reference) will be subject to the review of such Placement Agent Counsel, and
(ii) at the request of any Holder cause its  officers,  counsel and  independent
certified public accountants to respond to such inquiries as shall be necessary,
in the  reasonable  opinion of counsel to such Holders,  to conduct a reasonable
investigation within the meaning of the 1933 Act. The Company shall not file the
Registration  Statement or any such  Prospectus or any amendments or supplements
thereto to which the counsel(s) to the Holders of a majority of the  Registrable
Securities or the Placement Agent Counsel shall  reasonably  object within three
(3) Business Days after their receipt thereof;

          (c)  (i)   prepare  and  file  with  the  SEC  such   amendments   and
post-effective  amendments to the Registration  Statement as may be necessary to
keep the  Registration  Statement  effective  with  respect  to all  Registrable
Securities for the Effectiveness Period; (ii) cause the related Prospectus to be
amended  or  supplemented  by  any  required  Prospectus  supplement,  and as so
supplemented  or  amended  to be  filed  pursuant  to Rule  424 (or any  similar
provisions  then in force)  promulgated  under the 1933 Act;  (iii)  respond  as
promptly as possible,  and in no event later than fifteen (15)  Business Days to
the first set of  comments  and ten (10)  Business  Days to each set of comments
thereafter  received from the SEC with respect to the Registration  Statement or
any amendment thereto and as promptly as reasonably possible provide the Holders
true and complete copies of all  correspondence  from and to the SEC relating to

                                                             Page 56 of 70 Pages

the Registration  Statement;  and (iv) comply in all material  respects with the
provisions of the 1933 Act and the 1934 Act with respect to the  disposition  of
all Registrable  Securities  covered by the  Registration  Statement  during the
applicable  period in accordance with the intended methods of disposition by the
Holders thereof set forth in the Registration Statement as so amended or in such
Prospectus as so supplemented;

          (d)  notify  Holders  of  Registrable  Securities  to be sold  and the
Placement  Agent  Counsel as promptly as possible (A) when a  Prospectus  or any
Prospectus supplement or post-effective  amendment to the Registration Statement
is proposed to be filed (but in no event in the case of this  subparagraph  (A),
less than five (5) Business Days prior to date of such filing); (B) when the SEC
notifies  the  Company  whether  there will be a "review"  of such  Registration
Statement  and  whenever  the SEC  comments  in  writing  on  such  Registration
Statement;   and  (C)  with  respect  to  the  Registration   Statement  or  any
post-effective  amendment,  when the same has  become  effective,  and after the
effectiveness  thereof:  (i) of any  request by the SEC or any other  Federal or
state  governmental  authority for amendments or supplements to the Registration
Statement or Prospectus or for additional  information;  (ii) of the issuance by
the SEC of any stop  order  suspending  the  effectiveness  of the  Registration
Statement covering any or all of the Registrable Securities or the initiation of
any  Proceedings  for that  purpose;  (iii) of the receipt by the Company of any
notification  with respect to the suspension of the  qualification  or exemption
from  qualification  of  any of  the  Registrable  Securities  for  sale  in any
jurisdiction,  or the  initiation  or  threatening  of any  Proceeding  for such
purpose;  and (iv) if the  financial  statements  included  in the  Registration
Statement  become  ineligible for inclusion  therein or of the occurrence of any
event that makes any statement made in the Registration  Statement or Prospectus
or any document  incorporated or deemed to be incorporated  therein by reference
untrue  in  any  material   respect  or  that  requires  any  revisions  to  the
Registration  Statement,  Prospectus or other  documents so that, in the case of
the  Registration  Statement or the Prospectus,  as the case may be, it will not
contain any untrue  statement  of a material  fact or omit to state any material
fact required to be stated therein or necessary to make the statements  therein,
in the light of the  circumstances  under which they were made, not  misleading.
Without  limitation  to any remedies to which the Holders may be entitled  under
this  Agreement,   if  any  of  the  events  described  in  Section  3(d)(C)(i),
3(d)(C)(ii) and  3(d)(C)(iii)  occur,  the Company shall use its best efforts to
respond to and correct the event;

          (e) provide  copies to and permit  Placement  Agent  Counsel to review
each Registration  Statement and all amendments and supplements thereto no fewer
than five (5) Business  Days prior to their filing with the SEC and not file any
document to which such counsel reasonably objects within three (3) Business Days
following   receipt  by  the  Holders  and  Placement   Agent  Counsel  of  such
Registration Statement and/or amendments and supplements thereto;

          (f) furnish to the Holders and Placement  Agent Counsel such number of
copies of a Prospectus,  including a preliminary prospectus,  and all amendments
and  supplements  thereto and such other documents as each Holder may reasonably
request in order to facilitate  the  disposition of the  Registrable  Securities
owned by such Holder;

          (g) if requested by any Holder of Registrable Securities, (i) promptly
incorporate  in a  Prospectus  supplement  or  post-effective  amendment  to the
Registration  Statement such information as the Company reasonably agrees should
be  included  therein  and (ii) make all  required  filings  of such  Prospectus
supplement or such  post-effective  amendment as soon as  practicable  after the
Company has  received  notification  of the matters to be  incorporated  in such
Prospectus supplement or post-effective amendment;

          (h) in the event the Company  selects an underwriter for the offering,
the Company  shall enter into and perform its  reasonable  obligations  under an
underwriting  agreement,  in  usual  and  customary  form,  including,   without
limitation,  customary  indemnification and contribution  obligations,  with the
underwriter of such offering;

                                                             Page 57 of 70 Pages


          (i) if required by the underwriter,  the Company shall furnish, on the
effective date of the  Registration  Statement (i) an opinion,  dated as of such
date, from  independent  legal counsel  representing the Company for purposes of
such  Registration  Statement,  in form,  scope and substance as is  customarily
given in an underwritten public offering,  addressed to the underwriter and (ii)
a letter,  dated such date,  from the  Company's  independent  certified  public
accountants  in form  and  substance  as is  customarily  given  by  independent
certified public accountants to underwriters in an underwritten public offering,
addressed to the underwriter and the Holders;

          (j) use its reasonable best efforts to (i) prevent the issuance of any
stop order or other  suspension of  effectiveness  and, if such order is issued,
obtain the withdrawal of any such order at the earliest  possible moment or (ii)
any suspension of the qualification (or exemption from  qualification) of any of
the  Registrable  Securities  for  sale  in any  jurisdiction,  at the  earliest
practicable time;

          (k) prior to any public  offering of Registrable  Securities,  use its
reasonable best efforts to register or qualify or cooperate with the Holders and
their counsel in  connection  with the  registration  or  qualification  of such
Registrable  Securities for offer and sale under the securities or blue sky laws
of such  jurisdictions  reasonably  requested  by the Holders and do any and all
other   reasonable  acts  or  things   necessary  or  advisable  to  enable  the
distribution in such jurisdictions of the Registrable  Securities covered by the
Registration Statement; provided, that, the Company shall not for any purpose be
required to qualify to do business as a foreign  corporation in any jurisdiction
wherein  it is not so  qualified  or  execute a general  consent  to  service of
process in any jurisdiction;

          (l)  cause  all  Registrable  Securities  covered  by  a  Registration
Statement  to be  listed  on each  securities  exchange,  interdealer  quotation
system,  market or  over-the-counter  bulletin board on which similar securities
issued by the Company are then listed;

          (m) following  the  occurrence  of any event  contemplated  by Section
3(d)(C)(iv),  as  promptly  as  possible,  prepare a  supplement  or  amendment,
including  a  post-effective  amendment,  to  the  Registration  Statement  or a
supplement to the related  Prospectus or any document  incorporated or deemed to
be incorporated  therein by reference,  and file any other required  document so
that,  as  thereafter  delivered,  neither the  Registration  Statement nor such
Prospectus will contain an untrue  statement of a material fact or omit to state
a  material  fact  required  to be  stated  therein  or  necessary  to make  the
statements  therein,  in the light of the  circumstances  under  which they were
made, not misleading; and

          (n) otherwise use its best efforts to comply with all applicable rules
and  regulations  of the SEC  under  the 1933 Act and the 1934 Act and take such
other actions as may be reasonably  necessary to facilitate the  registration of
the  Registrable  Securities  hereunder;  and  make  available  to its  security
holders, as soon as reasonably practicable,  but not later than the Availability
Date (as defined  below),  an earnings  statement  covering a period of at least
twelve (12) months,  beginning  after the  effective  date of each  Registration
Statement,  which  earnings  statement  shall satisfy the  provisions of Section
11(a) of the 1933 Act (for the purpose of this  subsection  3(k),  "Availability
Date" means the 45th day  following  the end of the fourth  fiscal  quarter that
includes the effective date of such Registration Statement, except that, if such
fourth  fiscal  quarter  is the  last  quarter  of the  Company's  fiscal  year,
"Availability  Date"  means  the 90th day after  the end of such  fourth  fiscal
quarter).

4. Due Diligence Review;  Information.  The Company shall make available, during
normal  business  hours,  for  reasonable  inspection and review by the Holders,
advisors to and representatives of the Holders (who may or may not be affiliated
with the Holders),  and any  underwriter  participating  in any  disposition  of
Common Stock on behalf of the Holders  pursuant to a  Registration  Statement or
amendments or  supplements  thereto or any blue sky,  NASD or other filing,  all

                                                             Page 58 of 70 Pages

financial and other records,  all filings with the SEC, and all other  corporate
documents and  properties of the Company as may be reasonably  necessary for the
purpose  of such  review,  and  cause  the  Company's  officers,  directors  and
employees,  within a  reasonable  time  period,  to supply all such  information
reasonably  requested  by the  Holders  or any such  representative,  advisor or
underwriter in connection with such Registration  Statement (including,  without
limitation,  in response to all questions and other inquiries reasonably made or
submitted  by any of them),  prior to and from time to time after the filing and
effectiveness of the Registration Statement for the sole purpose of enabling the
Holders and such representatives, advisors and underwriters and their respective
accountants  and  attorneys to conduct  initial and ongoing due  diligence  with
respect to the Company and the accuracy of such Registration Statement.

          Notwithstanding the foregoing, the Company shall not disclose material
nonpublic  information to the Holders,  or to advisors to or  representatives of
the  Holders,  unless  prior  to  disclosure  of such  information  the  Company
identifies such information as being material nonpublic information and provides
the Holders, such advisors and representatives with the opportunity to accept or
refuse to accept such material nonpublic information for review.

5.        Obligations of the Holders.

          (a)  Each  Holder  shall  furnish  in  writing  to  the  Company  such
information  regarding  itself,  the  Registrable  Securities held by it and the
intended  method of disposition  of the  Registrable  Securities  held by it, as
shall be  reasonably  required to effect the  registration  of such  Registrable
Securities and shall execute such documents in connection with such registration
as the Company may reasonably  request. At least ten (10) Business Days prior to
the first  anticipated  filing date of any Registration  Statement,  the Company
shall  notify each Holder of the  information  the  Company  requires  from such
Holder if such Holder elects to have any of the Registrable  Securities included
in the  Registration  Statement.  A Holder shall provide such information to the
Company at least five (5) Business  Days prior to the first  anticipated  filing
date of such  Registration  Statement  if such Holder  elects to have any of the
Registrable Securities included in the Registration Statement.

          (b) Each Holder,  by its  acceptance  of the  Registrable  Securities,
agrees to cooperate  with the Company as reasonably  requested by the Company in
connection  with  the  preparation  and  filing  of  a  Registration   Statement
hereunder,  unless  such  Holder  has  notified  the  Company  in writing of its
election to exclude all of its  Registrable  Securities  from such  Registration
Statement.

          (c)  In  the  event  the  Company,  at the  request  of  the  Holders,
determines to engage the services of an underwriter, such Holder agrees to enter
into and perform its obligations under an underwriting  agreement,  in usual and
customary form,  including,  without limitation,  customary  indemnification and
contribution  obligations,  with the managing  underwriter  of such offering and
take such other  actions as are  reasonably  required  in order to  expedite  or
facilitate the dispositions of the Registrable Securities.

          (d) Each  Holder  agrees  that,  upon  receipt of any notice  from the
Company of the  happening  of any event  rendering a  Registration  Statement no
longer  effective,  such  Holder will  immediately  discontinue  disposition  of
Registrable  Securities  pursuant to the  Registration  Statement  covering such
Registrable Securities, until the Holder's receipt of copies of the supplemented
or amended  Prospectus  filed with the SEC and  declared  effective  and,  if so
directed by the Company, the Holder shall deliver to the Company (at the expense
of the  Company)  or  destroy  (and  deliver  to the  Company a  certificate  of
destruction)  all copies in the Holder's  possession of the Prospectus  covering
the Registrable Securities current at the time of receipt of such notice.

          (e)  No  Holder  may  participate  in  any  third  party  underwritten
registration  hereunder unless it (i) agrees to sell the Registrable  Securities

                                                             Page 59 of 70 Pages

on the basis provided in any  underwriting  arrangements  in usual and customary
form   entered   into  by  the  Company,   (ii)   completes   and  executes  all
questionnaires,  powers of attorney,  indemnities,  underwriting  agreements and
other  documents  reasonably  required  under  the  terms  of such  underwriting
arrangements,  and (iii)  agrees to pay its pro rata  share of all  underwriting
discounts and commissions.  Notwithstanding the foregoing, no Holder (other than
Holders  who are  Affiliates  of the  Company)  shall  be  required  to make any
representations to such underwriter, other than those with respect to itself and
the  Registrable  Securities  owned  by it,  including  its  right  to sell  the
Registrable  Securities,  and any indemnification in favor of the underwriter by
the  Holders  shall be  several  and not  joint and  limited  in the case of any
Holder,  to the net  proceeds  received  by such  Holder  from  the  sale of its
Registrable  Securities.  The scope of any such  indemnification  in favor of an
underwriter  shall be limited to the same  extent as the  indemnity  provided in
Section 6(b) hereof.

6.        Indemnification.

          (a)  Indemnification  by the Company.  The Company will  indemnify and
hold harmless each Holder and their respective Affiliates,  officers, directors,
members,  employees  and agents,  successors  and  assigns,  against any losses,
claims,  damages  or  liabilities,  joint  or  several,  to which  such  Holder,
Affiliate,  officer,  director, member, employee, agent, successor or assign may
become subject under the 1933 Act or otherwise,  insofar as such losses, claims,
damages or liabilities (or actions in respect thereof) arise out of or are based
upon: (i) any untrue  statement or alleged untrue statement of any material fact
contained in any Registration Statement, prospectus or preliminary prospectus or
any omission or alleged omission to state therein a material fact required to be
stated  therein or  necessary to make the  statements  therein (in the case of a
prospectus or preliminary  prospectus,  in the light of the circumstances  under
which they were made) not  misleading;  (ii) any blue sky  application  or other
document  executed by the Company  specifically for blue sky compliance or based
upon written  information  furnished by the Company  filed in any state or other
jurisdiction in order to qualify any or all of the Registrable  Securities under
the  securities  laws thereof  (any such  application,  document or  information
herein called a "Blue Sky Application");  (iii) any violation by the Company, or
its  directors,  officers,  employees  or  agents  of  any  rule  or  regulation
promulgated  under the 1933 Act  applicable  to the  Company  or its  directors,
officers, employees or agents and relating to action or inaction required of the
Company or any of them in connection with such registration; or (iv) any failure
to use its best  efforts to  register  or  qualify  the  Registrable  Securities
included in any such  Registration  Statement  in any state where the Company or
its agents has  affirmatively  undertaken  or agreed in writing that the Company
will undertake such  registration  or  qualification  on a Holder's  behalf (the
undertaking  of any  underwriter  chosen by the Company being  attributed to the
Company) and will  reimburse  such Holder,  and each such  officer,  director or
member  and each  such  controlling  person  for any  legal  or  other  expenses
reasonably  incurred by them in connection with  investigating  or defending any
such loss,  claim,  damage,  liability or action;  provided,  however,  that the
Company  will not be liable in any such case to the  extent  that any such loss,
claim, damage or liability arises out of or is based upon an untrue statement or
alleged untrue statement or omission or alleged omission made in conformity with
information  furnished in writing by such Holder or any such controlling  person
specifically for use in such Registration Statement or Prospectus.

          (b)   Indemnification   by  the  Holders.   In  connection   with  any
Registration Statement pursuant to the terms of this Agreement, each Holder will
furnish to the Company in writing  such  information  as the Company  reasonably
requests  concerning  such  Holder  or the  proposed  manner  of  such  Holder's
distribution for use in connection with any Registration Statement or Prospectus
and agrees,  severally but not jointly,  to indemnify and hold harmless,  to the
fullest extent permitted by law, the Company, its Subsidiaries and its and their
respective  directors,  officers,  employees,  shareholders  and each person who
controls  the Company  (within the meaning of the 1933 Act)  against any losses,
claims,  damages,  liabilities and expenses (including reasonable attorney fees)

                                                             Page 60 of 70 Pages

resulting  from any untrue  statement  of a material  fact or any  omission of a
material fact required to be stated in the Registration  Statement or Prospectus
or  preliminary  prospectus or amendment or  supplement  thereto or necessary to
make the  statements  therein not  misleading,  to the  extent,  but only to the
extent that such untrue  statement or omission is  contained in any  information
furnished in writing by such Holder to the Company specifically for inclusion in
such Registration Statement or Prospectus or amendment or supplement thereto. In
no event shall the liability of a Holder be greater in amount than the aggregate
dollar  amount of the  proceeds  received  by such  Holder  upon the sale of the
Registrable  Securities  included in the  Registration  Statement giving rise to
such indemnification obligation.

          (c) Conduct of  Indemnification  Proceedings.  Any person  entitled to
indemnification hereunder shall (i) give prompt notice to the indemnifying party
of any claim with respect to which it seeks indemnification and (ii) permit such
indemnifying  party to assume the defense of such claim with counsel  reasonably
satisfactory  to the  indemnified  party;  provided that any person  entitled to
indemnification hereunder shall have the right to employ separate counsel and to
participate  in the  defense of such  claim,  but the fees and  expenses of such
counsel shall be at the expense of such person unless (a) the indemnifying party
has agreed to pay such fees or  expenses,  or (b) the  indemnifying  party shall
have  failed to assume the defense of such claim and employ  counsel  reasonably
satisfactory  to such  person  or (c) in the  reasonable  judgment  of any  such
person,  based upon advice of its counsel, a conflict of interest exists between
such  person and the  indemnifying  party with  respect to such claims (in which
case, if the person notifies the indemnifying  party in writing that such person
elects to employ separate counsel at the expense of the indemnifying  party, the
indemnifying  party shall not have the right to assume the defense of such claim
on behalf of such  person);  and  provided,  further,  that the  failure  of any
indemnified  party to give  notice as  provided  herein  shall not  relieve  the
indemnifying party of its obligations hereunder,  except to the extent that such
failure to give notice shall materially  adversely affect the indemnifying party
in the  defense  of any such  claim or  litigation.  It is  understood  that the
indemnifying  party shall not, in  connection  with any  proceeding  in the same
jurisdiction,  be liable for fees or expenses of more than one separate  firm of
attorneys at any time for all such indemnified  parties.  No indemnifying  party
will, except with the consent of the indemnified party,  consent to entry of any
judgment or enter into any settlement that does not include as an  unconditional
term thereof the giving by the claimant or plaintiff to such  indemnified  party
of a release from all liability in respect of such claim or litigation.

          (d) Contribution.  If for any reason the indemnification  provided for
in the preceding  paragraphs (a) and (b) is unavailable to an indemnified  party
or  insufficient  to hold  it  completely  harmless,  other  than  as  expressly
specified  therein,  then the indemnifying  party shall contribute to the amount
paid or payable by the indemnified party as a result of such loss, claim, damage
or liability in such  proportion as is appropriate to reflect the relative fault
of the  indemnified  party  and the  indemnifying  party,  as well as any  other
relevant   equitable   considerations.    No   person   guilty   of   fraudulent
misrepresentation  within the meaning of Section  11(f) of the 1933 Act shall be
entitled  to  contribution  from  any  person  not  guilty  of  such  fraudulent
misrepresentation.  In no event shall the contribution obligation of a Holder be
greater in amount than the aggregate  dollar amount of the proceeds  received by
it upon the sale of the Registrable  Securities giving rise to such contribution
obligation.

     7. Rule 144

     As long as any Holder owns Shares,  Warrants,  Placement  Agent Warrants or
Warrant Shares,  the Company  covenants to timely file (or obtain  extensions in
respect  thereof  and file  within the  applicable  grace  period)  all  reports
required  to be filed by the Company  after the date hereof  pursuant to Section
13(a) or 15(d) of the 1934 Act.  As long as any Holder  owns  Shares,  Warrants,
Placement  Agent Warrants or Warrant  Shares,  if the Company is not required to
file reports pursuant to Section 13(a) or 15(d) of the 1934 Act, it will prepare

                                                             Page 61 of 70 Pages

and make publicly available in accordance with Rule 144(c) promulgated under the
1933 Act annual and quarterly financial  statements,  together with a discussion
and analysis of such  financial  statements in form and substance  substantially
similar to those that would  otherwise  be  required  to be  included in reports
required  by  Section  13(a)  or 15(d) of the  1934  Act,  as well as any  other
information  required  thereby,  in the time period that such filings would have
been  required  to have  been  made  under the 1934  Act.  The  Company  further
covenants  that it will take such  further  action as any Holder may  reasonably
request,  all to the extent  required from time to time to enable such Person to
sell Shares and Warrant  Shares without  registration  under the 1933 Act within
the limitation of the exemptions provided by Rule 144 promulgated under the 1933
Act, including compliance with the provisions of the Purchase Agreement relating
to the  transfer  of the  Shares and  Warrant  Shares.  Upon the  request of any
Holder,  the Company shall deliver to such Holder a written  certification  of a
duly authorized officer as to whether it has complied with such requirements.

     8. Miscellaneous.

          (a) Remedies.  In the event of a breach by the Company or by a Holder,
of any of their obligations under this Agreement, each Holder or the Company, as
the case may be, in addition to being entitled to exercise all rights granted by
law and under this Agreement, including recovery of damages, will be entitled to
specific  performance of its rights under this  Agreement.  The Company and each
Holder agree that monetary damages would not provide  adequate  compensation for
any losses incurred by reason of a breach by it of any of the provisions of this
Agreement  and  hereby  further  agrees  that,  in the event of any  action  for
specific  performance in respect of such breach, it shall waive the defense that
a remedy at law would be adequate.

          (b) No Inconsistent  Agreements.  Except as otherwise disclosed in the
Purchase  Agreement,  neither the Company nor any of its subsidiaries is a party
to an  agreement  currently  in  effect,  nor  shall the  Company  or any of its
subsidiaries,  on or after the date of this Agreement,  enter into any agreement
with respect to its securities that is  inconsistent  with the rights granted to
the Holders in this Agreement or otherwise conflicts with the provisions hereof.

          (c) Notice of Effectiveness.  Within three (3) Business Days after the
Registration  Statement  which  includes the  Registrable  Securities is ordered
effective by the SEC, the Company shall  deliver,  and shall cause legal counsel
for  the  Company  to  deliver,  to the  transfer  agent  for  such  Registrable
Securities (with copies to the Holders whose Registrable Securities are included
in such Registration Statement) confirmation that the Registration Statement has
been declared effective by the SEC in the form attached hereto as Exhibit B.

          (d)  Piggy-Back  Registrations.  If at any time  when  there is not an
effective  Registration Statement covering all of the Registrable Securities and
the Company is in breach of its obligations  hereunder with respect thereto, the
Company  shall  determine  to  prepare  and  file  with  the SEC a  registration
statement  relating to an offering  for its own account or the account of others
under the 1933 Act of any of its  equity  securities,  other than on Form S-4 or
Form S-8  (each as  promulgated  under  the  1933  Act) or its then  equivalents
relating  to equity  securities  to be  issued  solely  in  connection  with any
acquisition  of  any  entity  or  business  or  equity  securities  issuable  in
connection with stock option or other employee  benefit plans, the Company shall
send  to  each  Holder  of  Registrable   Securities   written  notice  of  such
determination  and,  if within  seven (7)  Business  Days after  receipt of such
notice, any such Holder shall so request in writing (which request shall specify
the  Registrable  Securities  intended  to be disposed  of by the  Holder),  the
Company  will  cause  the  registration  under  the 1933 Act of all  Registrable
Securities which the Company has been so requested to register by the Holder, to
the extent required to permit the  disposition of the Registrable  Securities so
to be  registered,  provided that if at any time after giving  written notice of
its intention to register any  securities and prior to the effective date of the

                                                             Page 62 of 70 Pages

registration  statement filed in connection with such registration,  the Company
shall determine for any reason not to register or to delay  registration of such
securities,  the  Company  may, at its  election,  give  written  notice of such
determination to such Holder and, thereupon,  (i) in the case of a determination
not to register, shall be relieved of its obligation to register any Registrable
Securities in connection with such  registration (but not from its obligation to
pay expenses in  accordance  with  Section 4 hereof),  and (ii) in the case of a
determination to delay registering,  shall be permitted to delay registering any
Registrable  Securities being  registered  pursuant to this Section 8(d) for the
same period as the delay in registering such other securities. The Company shall
include  in such  registration  statement  all or any  part of such  Registrable
Securities such Holder requests to be registered. In the case of an underwritten
public  offering,  if  the  managing  underwriter(s)  or  underwriter(s)  should
reasonably  object  to the  inclusion  of the  Registrable  Securities  in  such
registration statement, then if the Company after consultation with the managing
underwriter  should reasonably  determine that the inclusion of such Registrable
Securities,  would materially adversely affect the offering contemplated in such
registration statement,  and based on such determination recommends inclusion in
such  registration  statement of fewer or none of the Registrable  Securities of
the  Holders,  then (x) the  number of  Registrable  Securities  of the  Holders
included in such  registration  statement  shall be reduced  pro-rata among such
Holders  (based  upon the  number  of  Registrable  Securities  requested  to be
included  in the  registration),  if the  Company  after  consultation  with the
underwriter(s)  recommends the inclusion of fewer Registrable Securities, or (y)
none of the  Registrable  Securities  of the  Holders  shall be included in such
registration   statement,   if  the   Company   after   consultation   with  the
underwriter(s)  recommends the inclusion of none of such Registrable Securities;
provided, however, that if securities are being offered for the account of other
persons or entities as well as the Company, such reduction shall not represent a
greater fraction of the number of Registrable  Securities intended to be offered
by the Holders  than the  fraction of similar  reductions  imposed on such other
persons or entities (other than the Company).

          (e)  Failure to File  Registration  Statement  and Other  Events.  The
Company  and the  Holders  agree that the  Holders  will  suffer  damages if the
Registration  Statement  is not  filed on or prior to the  Filing  Deadline  and
maintained in the manner  contemplated  herein during the Effectiveness  Period.
The  Company  and the  Holders  further  agree that it would not be  feasible to
ascertain  the extent of such damages with  precision.  Accordingly,  if (i) the
Registration  Statement  pursuant to Section 2(a)(i) is not filed on or prior to
the Filing Deadline or a Registration Statement required to be filed pursuant to
Section  2(a)(ii) has not been filed within thirty (30) days  following the date
on which the  Additional  Shares  are  issued or  become  issuable,  or (ii) the
Company fails to file with the SEC a request for acceleration in accordance with
Rule 461  promulgated  under the 1933 Act within five (5)  Business  Days of the
date that the Company is notified  (orally or in writing,  whichever is earlier)
by the SEC that a Registration  Statement will not be "reviewed," or not subject
to  further  review,  or (iii)  the  Registration  Statement  is filed  with and
declared  effective by the SEC but  thereafter  ceases to be effective as to all
Registrable  Securities at any time prior to the expiration of the Effectiveness
Period,  without  being  succeeded  immediately  by  a  subsequent  Registration
Statement filed with the SEC,  except as otherwise  permitted by this Agreement,
or (iv) trading in the Common Stock shall be suspended or if the Common Stock is
delisted from AMEX or any other securities exchange, quotation system, market or
over-the-counter  bulletin  board on which  Registrable  Securities are required
hereunder to be listed (each an "Exchange"), without immediately being listed on
any other  Exchange,  for any reason for more than one (1) Business  Day, or (v)
the rights of the Holders to exercise into Warrant  Shares are suspended for any
reason without the consent of the  particular  Holder other than as set forth in
the  Purchase  Agreement  (any such  failure or breach  being  referred to as an
"Event"),  the Company will make pro rata payments to each Holder, as liquidated
damages and not as a penalty, in an amount equal to 1.0% of the aggregate amount
invested by such Holder (for purposes of this  Agreement,  the  Placement  Agent
shall be deemed to have  invested an amount  equal to ten  percent  (10%) of the
aggregate  purchase price of the Shares sold in the Private  Placement,  and for
all other  Holders,  the amount  invested by a Holder shall include the purchase
price of the  Shares  acquired  by such  Holder  and shall  exclude  any  amount
attributable to the Warrants  acquired by such Holder in the Private  Placement)

                                                             Page 63 of 70 Pages

for each 20-day period or pro rata for any portion thereof following the date on
which the Event occurred.  Such payments shall be in partial compensation to the
Holders, and shall not constitute the Holders' exclusive remedy for such Events.
Such  payments  shall be made to each  Holder in cash.  The  amounts  payable as
liquidated  damages  pursuant to this paragraph shall be payable in lawful money
of the United States,  and amounts  payable as liquidated  damages shall be paid
within two (2) Business  Days of the last day of each such 20-day  period during
which  the   Registration   Statement  should  have  been  filed  for  which  no
Registration  Statement  was filed with respect to the  Registrable  Securities.
Notwithstanding  the foregoing,  the Company shall remain  obligated to cure the
breach or correct the condition that caused the event, and the Holder shall have
the right to take any action necessary or desirable to enforce such obligation.

          (f)  Amendments  and Waivers.  This Agreement may be amended only by a
writing  signed by the then  current  parties  hereto.  The Company may take any
action  herein  prohibited,  or omit to perform  any act herein  required  to be
performed by it, only if the Company shall have obtained the written  consent to
such amendment, action or omission to act, of each then current Holder.

          (g)  Notices.  All notices and other  communications  provided  for or
permitted  hereunder  shall be made as set forth in Section 9.4 of the  Purchase
Agreement;  provided,  however,  as the  Placement  Agent  is not a party to the
Purchase  Agreement,  any notice or other  communication  to the Placement Agent
shall be sent to the address for the Placement  Agent set forth on the signature
page hereof  (which  address the Placement  Agent may change in accordance  with
Section 9.4 of the Purchase Agreement).

          (h)  Assignments  and  Transfers by Holders.  The  provisions  of this
Agreement  shall be binding  upon and inure to the  benefit of the  Holders  and
their respective  successors and assigns.  An Holder may transfer or assign,  in
whole or from time to time in part, to one or more persons its rights  hereunder
in connection with the transfer of Registrable Securities by such Holder to such
person,  provided,  that,  such Holder complies with all applicable laws thereto
and provides  written  notice of assignment to the Company  promptly  after such
assignment is effected.

          (i) Assignments and Transfers by the Company. This Agreement shall not
be assigned by the Company  without the prior  written  consent of each  Holder,
except that without the prior written  consent of the Holders,  but after notice
duly  given,  the  Company  shall  assign  its rights  and  delegate  its duties
hereunder    to    any    successor-in-interest     corporation,     and    such
successor-in-interest  shall  assume such  rights and duties,  in the event of a
merger or consolidation  of the Company with or into another  corporation or the
sale of all or substantially all of the Company's assets.

          (j)  Benefits  of the  Agreement.  The  terms and  conditions  of this
Agreement  shall  inure to the  benefit  of and be binding  upon the  respective
permitted  successors  and assigns of the  parties.  Nothing in this  Agreement,
express or implied,  is intended to confer upon any party other than the parties
hereto  or  their  respective  successors  and  assigns  any  rights,  remedies,
obligations,  or  liabilities  under or by reason of this  Agreement,  except as
expressly provided in this Agreement.

          (k) Counterparts; Faxes. This Agreement may be executed in two or more
counterparts,  each of  which  shall be  deemed  an  original,  but all of which
together shall constitute one and the same  instrument.  This Agreement may also
be executed via facsimile, which shall be deemed an original.

          (l)  Titles and  Subtitles.  The  titles  and  subtitles  used in this
Agreement  are  used  for  convenience  only  and  are not to be  considered  in
construing or interpreting this Agreement.

          (m)  Severability.  Any provision of this Agreement that is prohibited
or  unenforceable  in  any  jurisdiction  shall,  as to  such  jurisdiction,  be

                                                             Page 64 of 70 Pages

ineffective  to the  extent  of such  prohibition  or  unenforceability  without
invalidating the remaining  provisions  hereof but shall be interpreted as if it
were  written  so as to be  enforceable  to  the  maximum  extent  permitted  by
applicable law, and any such prohibition or unenforceability in any jurisdiction
shall  not  invalidate  or  render  unenforceable  such  provision  in any other
jurisdiction.  To the extent  permitted by  applicable  law, the parties  hereby
waive any provision of law which  renders any  provisions  hereof  prohibited or
unenforceable in any respect.

          (n) Further Assurances. The parties shall execute and deliver all such
further  instruments  and  documents  and  take all such  other  actions  as may
reasonably be required to carry out the transactions  contemplated hereby and to
evidence the fulfillment of the agreements herein contained.

          (o) Entire  Agreement.  This Agreement is intended by the parties as a
final  expression of their agreement and intended to be a complete and exclusive
statement of the agreement and understanding of the parties hereto in respect of
the  subject  matter  contained  herein.  This  Agreement  supersedes  all prior
agreements and  understandings  between the parties with respect to such subject
matter.

          (p) Specific Enforcement;  Governing Law; Consent to Jurisdiction. The
Company and the Holders  acknowledge  and agree that  irreparable  damage  would
occur  in the  event  that  any of the  provisions  of this  Agreement  were not
performed in accordance with their specific terms or were otherwise breached. It
is  accordingly  agreed that the parties  shall be entitled to an  injunction or
injunctions  to prevent or cure breaches of the provisions of this Agreement and
to enforce  specifically the terms and provisions hereof, this being in addition
to any other remedy to which any of them may be entitled by law or equity.  This
Agreement  shall be governed by, and construed in accordance  with, the internal
laws of the State of New York  without  regard to the  choice of law  principles
thereof.  Each  of the  parties  hereto  irrevocably  submits  to the  exclusive
jurisdiction  of the courts of the State of New York  located in New York County
and the United States  District Court for the Southern  District of New York for
the purpose of any suit,  action,  proceeding or judgment relating to or arising
out of this  Agreement  and the  transactions  contemplated  hereby.  Service of
process in connection with any such suit,  action or proceeding may be served on
each party hereto anywhere in the world by the same methods as are specified for
the  giving  of  notices  under  this  Agreement.  Each  of the  parties  hereto
irrevocably  consents  to the  jurisdiction  of any such court in any such suit,
action or proceeding and to the laying of venue in such court. Each party hereto
irrevocably waives any objection to the laying of venue of any such suit, action
or proceeding  brought in such courts and irrevocably  waives any claim that any
such suit, action or proceeding brought in any such court has been brought in an
inconvenient forum.

          (q)  Obligations  of  Holders.   The  Company  acknowledges  that  the
obligations of each Holder under this Agreement,  are several and not joint with
the  obligations of any other Holder,  and no Holder shall be responsible in any
way for the  performance  of the  obligations  of any other  Holder  under  this
Agreement.  The  decision of each Holder to enter into this  Agreement  has been
made by such Holder  independently  of any other  Holder.  The  Company  further
acknowledges  that nothing  contained in this Agreement,  and no action taken by
any Holder  pursuant  hereto,  shall be deemed to  constitute  the  Holders as a
partnership,  an  association,  a joint venture or any other kind of entity,  or
create a  presumption  that the Holders are in any way acting in concert or as a
group with respect to such obligations or the transactions  contemplated hereby.
Each Holder shall be entitled to  independently  protect and enforce its rights,
including without limitation,  the rights arising out of this Agreement,  and it
shall not be necessary for any other Holder to be joined as an additional  party
in any proceeding for such purpose.

          Each Holder  acknowledges that it was introduced to the Company by SCO
Capital Partners LLC which has acted solely as agent for the Company and not for
any Holder  (other  than  itself).  Each  Holder  acknowledges  that it has been

                                                             Page 65 of 70 Pages

represented by its own separate  legal counsel in its review and  negotiation of
this Agreement and with respect to the  transactions  contemplated  hereby.  For
reasons of  administrative  convenience  only,  this Agreement has been prepared
with the  assistance  of the Placement  Agent  Counsel  (counsel for SCO Capital
Partners LLC) and the Placement  Agent Counsel will perform certain duties under
this Agreement.  Each Holder  acknowledges  that such counsel does not represent
the  Holders  but only SCO  Capital  Partners  LLC.  The  Company has elected to
provide all Holders with the same terms and Agreement for the convenience of the
Company and not because it was  required or  requested  to do so by the Holders.
The Company  acknowledges  that such procedure with respect to this Agreement in
no way creates a  presumption  that the Holders are in any way acting in concert
or as a group with respect to this  Agreement or the  transactions  contemplated
hereby or thereby.



                            [Signature Pages Follow]




                                                             Page 66 of 70 Pages


                            [Company Signature Page]

               IN WITNESS  WHEREOF,  the Company has executed this  Registration
Rights  Agreement  or  caused  its duly  authorized  officers  to  execute  this
Registration Rights Agreement as of the date first above written.



The Company:                  BIOENVISION, INC.


                              By:_________________________
                              Name:  David P. Luci
                              Title: Chief Financial Officer and
                                     General Counsel





                                                             Page 67 of 70 Pages


                            [Holder Signature Page]

     IN WITNESS WHEREOF,  the undersigned has executed this Registration  Rights
Agreement or caused its duly  authorized  officers to execute this  Registration
Rights Agreement as of the date first above written.





Date:
      -------------------

IF AN INDIVIDUAL:                           IF A CORPORATION, PARTNERSHIP,
                                              TRUST, ESTATE OR OTHER ENTITY:
-----------------------------------
(Signature)
                                            ------------------------------------
                                            Print name of entity
-----------------------------------
(Printed Name)                              By:
                                                --------------------------------
                                                Name:
                                                      --------------------------
                                                Title:
                                                      --------------------------

Address:                                    Address:

-----------------------------------         -----------------------------------

-----------------------------------         -----------------------------------

-----------------------------------         -----------------------------------




                                                             Page 68 of 70 Pages

                                    EXHIBIT A

                              PLAN OF DISTRIBUTION

     We are  registering  the  shares of common  stock on behalf of the  selling
security  holders.  Sales of shares  may be made by  selling  security  holders,
including   their   respective   donees,   transferees,    pledgees   or   other
successors-in-interest  directly to  purchasers  or to or through  underwriters,
broker-dealers  or  through  agents.  Sales may be made from time to time on the
American Stock Exchange,  any other exchange or market upon which our shares may
trade in the future,  in the  over-the-counter  market or  otherwise,  at market
prices prevailing at the time of sale, at prices related to market prices, or at
negotiated  or fixed  prices.  The  shares  may be sold by one or more of,  or a
combination of, the following:

-    a block trade in which the  broker-dealer  so engaged  will attempt to sell
     the shares as agent but may  position  and resell a portion of the block as
     principal to facilitate  the  transaction  (including  crosses in which the
     same broker acts as agent for both sides of the transaction);

-    purchases by a broker-dealer as principal and resale by such broker-dealer,
     including resales for its account, pursuant to this prospectus;

-    ordinary  brokerage  transactions  and  transactions  in which  the  broker
     solicits purchases;

-    through options, swaps or derivatives;

-    in privately negotiated transactions;

-    in making short sales or in transactions to cover short sales; and

-    put or call option transactions relating to the shares.

     The selling  security  holders  may effect  these  transactions  by selling
shares directly to purchasers or to or through broker-dealers,  which may act as
agents or principals.  These broker-dealers may receive compensation in the form
of discounts,  concessions  or  commissions  from the selling  security  holders
and/or the purchasers of shares for whom such  broker-dealers  may act as agents
or to  whom  they  sell  as  principals,  or both  (which  compensation  as to a
particular  broker-dealer  might be in excess  of  customary  commissions).  The
selling  security  holders  have  advised us that they have not entered into any
agreements,   understandings   or   arrangements   with  any   underwriters   or
broker-dealers regarding the sale of their securities.

     The selling  security  holders  may enter into  hedging  transactions  with
broker-dealers  or  other  financial  institutions.  In  connection  with  those
transactions,  the broker-dealers or other financial  institutions may engage in
short sales of the shares or of securities  convertible into or exchangeable for
the shares in the course of  hedging  positions  they  assume  with the  selling
security  holders.  The selling  security holders may also enter into options or
other  transactions with  broker-dealers or other financial  institutions  which
require  the   delivery  of  shares   offered  by  this   prospectus   to  those
broker-dealers  or other  financial  institutions.  The  broker-dealer  or other
financial institution may then resell the shares pursuant to this prospectus (as
amended or  supplemented,  if  required  by  applicable  law,  to reflect  those
transactions).

     The selling security holders and any broker-dealers  that act in connection
with the sale of shares may be deemed to be "underwriters" within the meaning of
Section 2(11) of the  Securities Act of 1933,  and any  commissions  received by
broker-dealers  or any  profit on the  resale of the  shares  sold by them while
acting as principals may be deemed to be  underwriting  discounts or commissions

                                                             Page 69 of 70 Pages

under the Securities  Act. The selling  security  holders may agree to indemnify
any agent,  dealer or broker-dealer that participates in transactions  involving
sales of the shares against liabilities, including liabilities arising under the
Securities Act. We have agreed to indemnify each of the selling security holders
and each selling  security  holder has agreed,  severally  and not  jointly,  to
indemnify us against some  liabilities  in  connection  with the offering of the
shares, including liabilities arising under the Securities Act.

     The selling  security  holders will be subject to the  prospectus  delivery
requirements  of the  Securities  Act. We have  informed  the  selling  security
holders that the anti-manipulative  provisions of Regulation M promulgated under
the 1934 Act may apply to their sales in the market.

     Selling  security holders also may resell all or a portion of the shares in
open market  transactions  in reliance upon Rule 144 under the  Securities  Act,
provided they meet the criteria and conform to the requirements of Rule 144.

     Upon  being  notified  by  a  selling   security  holder  that  a  material
arrangement  has been entered into with a  broker-dealer  for the sale of shares
through a block trade,  special  offering,  exchange  distribution  or secondary
distribution  or a purchase by a broker or dealer,  we will file a supplement to
this prospectus,  if required  pursuant to Rule 424(b) under the Securities Act,
disclosing:

-    the name of each such  selling  security  holder  and of the  participating
     broker-dealer(s);

-    the number of shares involved;

-    the initial price at which the shares were sold;

-    the   commissions   paid  or  discounts  or  concessions   allowed  to  the
     broker-dealer(s), where applicable;

-    that such  broker-dealer(s) did not conduct any investigation to verify the
     information set out or incorporated by reference in this prospectus; and

-    other facts material to the transactions.

     In addition,  if required under  applicable law or the rules or regulations
of the  Commission,  we will file a supplement to this prospectus when a selling
security  holder  notifies us that a donee or pledgee  intends to sell more than
500 shares of common stock.

     We are  paying  all  expenses  and fees  customarily  paid by the issuer in
connection with the  registration of the shares.  The selling  security  holders
will  bear all  brokerage  or  underwriting  discounts  or  commissions  paid to
broker-dealers in connection with the sale of the shares.







                                                             Page 70 of 70 Pages


                                    EXHIBIT B

            FORM OF NOTICE OF EFFECTIVENESS OF REGISTRATION STATEMENT


[Name and Address of Transfer Agent]

Re:  Bioenvision, Inc.

Dear [______]:

     We  are  counsel  to  Bioenvision,   Inc.,  a  Delaware   corporation  (the
"Company"),  and have  represented  the Company in connection  with that certain
Common Stock and Warrant Purchase Agreement (the "Purchase  Agreement") dated as
of  __________________,  2004 by and  among the  Company  and the  buyers  named
therein  (collectively,  the "Holders")  pursuant to which the Company issued to
the Holders  shares of its Common Stock,  par value $0.01 per share (the "Common
Stock"),  and warrants to purchase shares of the Common Stock (the  "Warrants").
Pursuant  to the  Purchase  Agreement,  the  Company  has also  entered  into an
Investor  Rights  Agreement with the Holders (the "Investor  Rights  Agreement")
pursuant to which the Company agreed, among other things, to register the shares
of Common Stock issued  pursuant to the Purchase  Agreement and the Common Stock
issuable  upon exercise of the Warrants,  under the  Securities  Act of 1933, as
amended (the  "Securities  Act"). In connection  with the Company's  obligations
under the Investor  Rights  Agreement,  on  ____________  ___, 2004, the Company
filed a Registration  Statement on Form S-__ (File No.  333-_____________)  (the
"Registration  Statement")  with the  Securities  and Exchange  Commission  (the
"SEC") relating to the Registrable Securities which names each of the Holders as
a selling securityholder thereunder.

     In connection with the foregoing,  we advise you that a member of the SEC's
staff has advised us by  telephone  that the SEC has entered an order  declaring
the Registration  Statement effective under the Securities Act at [ENTER TIME OF
EFFECTIVENESS] on [ENTER DATE OF EFFECTIVENESS] and we have no knowledge,  after
telephonic  inquiry  of a  member  of the  SEC's  staff,  that  any  stop  order
suspending its  effectiveness  has been issued or that any  proceedings for that
purpose  are  pending  before,  or  threatened  by, the SEC and the  Registrable
Securities  are  available for resale under the  Securities  Act pursuant to the
Registration Statement.

Very truly yours,


By:  __________________________________
cc:  [LIST NAMES OF HOLDERS]