Exhibit 31.1

                                  CERTIFICATION
                          PURSUANT TO 17 CFR 240.13a-14
                                PROMULGATED UNDER
                  SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Christopher B. Wood, certify that:

1.       I have  reviewed  this  annual  report on Form  10-K,  as  amended,  of
         Bioenvision, Inc.;

2.       Based on my  knowledge,  this annual report does not contain any untrue
         statement of a material fact or omit to state a material fact necessary
         to make the statements made, in light of the circumstances  under which
         such  statements  were made, not misleading  with respect to the period
         covered by this annual report;

3.       Based on my knowledge,  the financial  statements,  and other financial
         information  included  in this  annual  report,  fairly  present in all
         material  respects the financial  condition,  results of operations and
         cash flows of the  registrant as of, and for, the periods  presented in
         this annual report;

4.       The  registrant's  other  certifying  officer and I am responsible  for
         establishing and maintaining disclosure controls and procedures (as
         defined in Exchange Act Rules  13a-15(e)  and  15d-15(e))  and internal
         control  over  financial  reporting  (as defined in Exchange  Act Rules
         13a-15(f) and 15d-15(f)) for the registrant and have:

         (a)   Designed such disclosure controls and procedures,  or caused such
               disclosure  controls  and  procedures  to be  designed  under our
               supervision,  to ensure that material information relating to the
               registrant,  including  its  consolidated  subsidiaries,  is made
               known to us by others within those entities,  particularly during
               the period in which this annual report is being prepared;

         (b)   Designed  such  internal  control over  financial  reporting,  or
               caused such  internal  control  over  financial  reporting  to be
               designed under our supervision,  to provide reasonable  assurance
               regarding  the   reliability  of  financial   reporting  and  the
               preparation  of financial  statements  for  external  purposes in
               accordance with generally accepted accounting principles;

         (c)   Evaluated  the  effectiveness  of  the  registrant's   disclosure
               controls and  procedures  and presented in this annual report our
               conclusions  about the  effectiveness of the disclosure  controls
               and  procedures,  as of the  end of the  period  covered  by this
               annual report based on such evaluation; and

         (d)   Disclosed in this report any change in the registrant's  internal
               control  over  financial  reporting  (as defined in Exchange  Act
               Rules   13a-15(f)  and  15d-15(f))   that  occurred   during  the
               registrant's most recent fiscal quarter (the registrant's  fourth
               fiscal  quarter  in  the  case  of an  annual  report)  that  has
               materially  affected,  or  is  reasonably  likely  to  materially
               affect,   the   registrant's   internal  control  over  financial
               reporting; and

     5.  The registrant's other certifying  officer and I have disclosed,  based
         on our most  recent  evaluation  of  internal  control  over  financial
         reporting,  to the  registrant's  auditors  and the audit  committee of
         registrant's  board of directors (or persons  performing the equivalent
         function):


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         (a)  All significant deficiencies and material weaknesses in the design
              or operation of internal  control over financial  reporting  which
              are reasonably likely to adversely affect the registrant's ability
              to record,  process,  summarize and report financial  information;
              and

         (b)  Any fraud,  whether or not material,  that involves  management or
              other  employees who have a significant  role in the  registrant's
              internal control over financial reporting.



Date: February 14, 2007

                                                       /s/ Christopher B. Wood
                                                     ---------------------------
                                                     Christopher B. Wood
                                                     Chief Executive Officer