FORM OF LOCK-UP AGREEMENT
February 1, 2002
Bioenvision, Inc.
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and
Each of the Former Stockholders of Pathagon Inc.
whose names and addresses are set forth on Schedule A
hereto
c/o Pathagon Inc.
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Gentlemen:
Reference is made to that certain Amended and
Restated Agreement and Plan of Merger, dated as of the date
hereof (the "Merger Agreement"), among Bioenvision, Inc.
("Bioenvision"), Bioenvision Acquisition Corp. and Pathagon
Inc. ("Pathagon") and that certain Registration Rights
Agreement, dated as of the date hereof, by and among
Bioenvision and each of the former stockholders of Pathagon
listed on Schedule A hereto (the "Registration Rights
Agreement"). Capitalized terms used not otherwise defined
herein shall have the respective meanings ascribed to such
terms in the Registration Rights Agreement.
The undersigned hereby agrees that from the date
hereof until the date and time upon which a registration
statement filed by Bioenvision with the Commission which
registers the resale of all of the Registrable Securities
has become effective under the Securities Act, the
undersigned will not offer, sell or otherwise dispose of, or
contract to dispose of (or announce any offer, sale, grant
of any option to purchase or other disposition of), pledge
or hypothecate, directly or indirectly, any shares of common
stock, par value $.001 per share, of Bioenvision (the
"Common Stock"), any options or warrants to purchase any
shares of Common Stock, or any securities convertible into
or exchangeable for shares of Common Stock, directly or
indirectly, without the prior written consent of a majority
in interest of the former stockholders of Pathagon listed on
Schedule A hereto.
Very truly yours,
______________________
[Name of Director, Officer or 5% Stockholder]
Schedule A
Al-Mandani Investment Co. Ltd.
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Benefit Capital Management
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Dow Chemical Company
Dorinco 100
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Community Investment Partners III, LP, LLLP
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Gutrafin, Ltd.
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Hoegh Invest A/S
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Chairman
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Oakwood Investors I, LLC
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SCO Capital Partners
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SCO Financial Group
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