Document:

<PAGE>

                                                                   Exhibit 10.04

On February 10, 2006, we granted Restricted Stock Units pursuant to our form of
Restricted Stock Unit Agreement included below, to the named executive officers
and in the amounts set forth below:

<TABLE>
<S>                                                      <C>
Izak Bencuya .......................................     4,400
Thomas A. Beaver ...................................     4,400
Laurenz Schmidt ....................................     3,200
Robert J. Conrad ...................................     3,600
</TABLE>

                         [FAIRCHILD SEMICONDUCTOR LOGO]

                       FAIRCHILD SEMICONDUCTOR STOCK PLAN
                      RESTRICTED STOCK UNIT AWARD AGREEMENT

PARTICIPANT: ________         EMPLOYEE ID: ________         GLOBAL ID: _________

GRANT DATE:

NUMBER OF RESTRICTED STOCK UNITS GRANTED: ____________ UNITS

THIS AGREEMENT, effective as of the Grant Date set forth above, is between
Fairchild Semiconductor International, Inc., a Delaware corporation (the
"Company", "we", "our" or "us") and the Participant named above ("you" or
"yours"), pursuant to the provisions of the Fairchild Semiconductor Stock Plan
(the "Plan") with respect to the award of the number of restricted stock units
("Restricted Stock Units") specified above. Capitalized terms used and not
defined in this Agreement shall have the meanings given to them in the Plan.

By accepting this Grant, you irrevocably agree, on your own behalf and on behalf
of your heirs and any other person claiming rights under this Agreement, to all
of the terms and conditions of the Restricted Stock Unit Award as set forth in
or pursuant to this Agreement and the Plan (as such may be amended from time to
time). You and the Company agree as follows:

1. APPLICATION OF PLAN;       This Agreement and your rights under this
   ADMINISTRATION             Agreement are subject to all the terms and
                              conditions of the Plan, as it may be amended from
                              time to time, as well as to such rules and
                              regulations as the Committee may adopt. It is
                              expressly understood that the Committee that
                              administers the Plan is authorized to administer,
                              construe and make all determinations necessary or
                              appropriate to the administration of the Plan and
                              this Agreement, all of which shall be binding upon
                              you to the extent permitted by the Plan. Any
                              inconsistency between this Agreement and the Plan
                              shall be resolved in favor of the Plan.

2. VESTING                    The Restricted Stock Units will vest (becoming
                              "Vested Restricted Stock Units") on the following
                              Vesting Dates provided that you have remained in
                              the full time employment or service of the Company
                              or an Affiliate from the Grant Date set forth
                              above until the respective Vesting Date:

<TABLE>
<CAPTION>
                                                         Percentage Vested
    Vesting Date                        (including portion that vested the preceding year)
<S>                                     <C>
First anniversary of the Grant Date                             25%
Second anniversary of the Grant Date                            50%
Third anniversary of the Grant Date                             75%
Fourth anniversary of the Grant Date                           100%
</TABLE>

                              The vesting period set forth above may be adjusted
                              by the Committee to reflect the decreased level of
                              employment or service during any period in which
                              you are on an approved leave of absence or are
                              employed on a less than full time basis.

3. TERMINATION OF             Except as otherwise provided in Paragraph 7 of
   EMPLOYMENT                 this Agreement, the right to issuance of
                              Restricted Stock Units and the rights under any
                              Restricted Stock Units that have not become Vested
                              Restricted Stock Units at the time your employment
                              or service with the Company terminates for any
                              reason will be

                                       1

<PAGE>

                              forfeited immediately without consideration and
                              without further notice as of the date of
                              termination.

4. SETTLEMENT OF VESTED       Each Vested Restricted Stock Unit will be settled
   UNITS RESTRICTED           by the delivery of one share of Common Stock
   STOCK AND ISSUANCE OF      (subject to adjustment under Section 3(c) of the
   SHARES                     Plan, a "Share") to you or, in the event of your
                              death, to your designated beneficiary, promptly
                              following the Vesting Date with respect to such
                              Shares, subject to your satisfaction of any tax
                              withholding obligations as described in Paragraph
                              9 of this Agreement. You hereby authorize any
                              brokerage service provider determined acceptable
                              to the Company, to open a securities account for
                              you to be used for the settlement of Vested
                              Restricted Stock Units. The date on which Shares
                              are issued may include a delay in order to provide
                              the Company such time as it determines appropriate
                              to address tax withholding and other
                              administrative matters.

5. RIGHTS AS STOCKHOLDER      Except as otherwise provided in this Agreement,
                              you will not be entitled to any privileges of
                              ownership of the shares of Common Stock underlying
                              your Restricted Stock Units unless and until
                              Shares are actually delivered to you under this
                              Agreement.

6. DIVIDENDS                  From and after the date that Restricted Stock
                              Units are issued to you under this Agreement, you
                              will be credited with additional Restricted Stock
                              Units having a value equal to declared dividends,
                              if any, with record dates that occur prior to the
                              settlement of any Restricted Stock Units as if
                              such Restricted Stock Units had been actual shares
                              of Common Stock, based on the Fair Market Value of
                              a share of Common Stock on the applicable dividend
                              payment date. Any such additional Restricted Stock
                              Units shall be considered Restricted Stock Units
                              under this Agreement and shall also be credited
                              with additional Restricted Stock Units as
                              dividends, if any, are declared, and shall be
                              subject to the same restrictions and conditions
                              (including the risk of forfeiture under Paragraph
                              3) as Restricted Stock Units with respect to which
                              they were credited. Notwithstanding the foregoing,
                              no such additional Restricted Stock Units will be
                              credited with respect to any dividend in
                              connection with which Restricted Stock Units are
                              adjusted pursuant to Section 3(c) of the Plan.

7. CHANGE IN CONTROL          Notwithstanding anything to the contrary in this
                              Agreement, the Restricted Stock Units shall be
                              subject to acceleration of vesting upon a Change
                              in Control as provided with respect to restricted
                              stock under Section 11(a)(ii) of the Plan, and
                              shall be settled as if pursuant to Paragraph 4 of
                              this Agreement.

8. TRANSFERABILITY            (a)  Your Restricted Stock Units are not
                                   transferable, whether voluntarily or
                                   involuntarily, by operation of law or
                                   otherwise, except as provided in the Plan.
                                   Any assignment, pledge, transfer, or other
                                   disposition, voluntary or involuntary, of
                                   your Restricted Stock Units made, or any
                                   attachment, execution, garnishment, or lien
                                   issued against or placed upon the Restricted
                                   Stock Units, other than as so permitted,
                                   shall be void.

                              (b)  You acknowledge that, from time to time, the
                                   Company may be in a "blackout period" and/or
                                   subject to applicable securities laws that
                                   could subject you to liability for engaging
                                   in any transaction involving the sale of the
                                   Company's shares. You further acknowledge and
                                   agree that, prior to the sale of any Shares,
                                   it is your responsibility to determine
                                   whether or not such sale of Shares will
                                   subject you to liability under insider
                                   trading rules or other applicable securities
                                   laws.

9. TAXES                      (a)  General. You are ultimately liable and
                                   responsible for all taxes owed by you in
                                   connection with your Restricted Stock Units,
                                   regardless of any action the Company takes or
                                   any transaction pursuant to this Paragraph 9
                                   with respect to any tax withholding
                                   obligations that arise in connection with the
                                   Restricted Stock Units. As a condition and
                                   term of this award, no election under Section
                                   83(b) of the United States Internal Revenue
                                   Code, as amended, may be made by you or any
                                   other person with respect to all or any
                                   portion of the Restricted Stock Units. The
                                   Company makes no representation or
                                   undertaking regarding the treatment of any
                                   tax withholding in connection with the grant,
                                   issuance, vesting or settlement of the
                                   Restricted Stock Units or the subsequent sale
                                   of any of the Shares underlying the
                                   Restricted Stock Units that vest. The Company
                                   does not commit and is under no obligation to
                                   structure this Agreement to reduce or
                                   eliminate your tax liability.

                              (b)  Taxes. You will be subject to federal and
                                   state income and other tax withholding
                                   requirements on a date (generally, the
                                   Vesting Date) determined by applicable law
                                   (any such date, the "Taxable Date"), based on
                                   the Fair Market Value of the Shares
                                   underlying the Restricted Stock Units that
                                   vest. YOU WILL BE SOLELY RESPONSIBLE FOR THE
                                   PAYMENT OF ALL U.S. FEDERAL INCOME AND OTHER
                                   TAXES, INCLUDING ANY STATE, LOCAL OR NON-U.S.
                                   INCOME OR EMPLOYMENT TAX OBLIGATION THAT MAY
                                   BE RELATED TO THE SHARES, INCLUDING ANY SUCH
                                   TAXES THAT ARE REQUIRED TO BE WITHHELD AND
                                   PAID OVER

                                       2

<PAGE>

                                   TO THE APPLICABLE TAX AUTHORITIES (THE "TAX
                                   WITHHOLDING OBLIGATION"). You will be
                                   responsible for the satisfaction of such Tax
                                   Withholding Obligation in a manner acceptable
                                   to the Company in its sole discretion,
                                   including through payroll withholding.

                                   (i) By Sale of Shares. Your acceptance of
                                   this Agreement constitutes your instruction
                                   and authorization to the Company and any
                                   brokerage firm determined acceptable to the
                                   Company for such purpose to sell on your
                                   behalf a whole number of shares from those
                                   Shares issuable to you as the Company
                                   determines to be appropriate to generate cash
                                   proceeds sufficient to satisfy the applicable
                                   Tax Withholding Obligation. Such shares will
                                   be sold on the Taxable Date or as soon
                                   thereafter as practicable. You will be
                                   responsible for all brokers' fees and other
                                   costs of sale, which fees and costs may be
                                   deducted from the proceeds of the foregoing
                                   sale of Shares, and you agree to indemnify
                                   and hold the Company and any brokerage firm
                                   selling such Shares harmless from any losses,
                                   costs, damages, or expenses relating to any
                                   such sale. To the extent the proceeds of such
                                   sale exceed your Tax Withholding Obligation,
                                   such excess cash will be deposited into the
                                   securities account established with the
                                   brokerage service provider for the settlement
                                   of your Vested Restricted Stock Units. Such
                                   Shares will be sold through the broker at
                                   market prices; however the price you receive
                                   will reflect a weighted average sales price
                                   based on the sales price of Shares on behalf
                                   of you and others for whom the designated
                                   broker may be selling shares on the relevant
                                   day(s), and you acknowledge that the Company
                                   or its designee is under no obligation to
                                   arrange for such sale at any particular
                                   price, and that the proceeds of any such sale
                                   may not be sufficient to satisfy your Tax
                                   Withholding Obligation. Accordingly, you
                                   agree to pay to the Company as soon as
                                   practicable, including through additional
                                   payroll withholding, any amount of the Tax
                                   Withholding Obligation that is not satisfied
                                   by the sale of shares described above. UNLESS
                                   OTHERWISE AUTHORIZED BY THE COMMITTEE IN ITS
                                   SOLE DISCRETION, THE SALE OF SHARES WILL BE
                                   THE PRIMARY METHOD USED BY THE COMPANY TO
                                   SATISFY THE APPLICABLE TAX WITHHOLDING
                                   OBLIGATION, and accordingly you represent and
                                   warrant to the Company as follows:

                                   A.   You are accepting this Agreement during
                                        a permitted trading period, and at the
                                        time of accepting this Agreement you are
                                        not aware of any Material Nonpublic
                                        Information (as defined in the Company's
                                        Corporate Legal Insider Trading and
                                        Tipping Policy) concerning the Company.

                                   B.   You will not exercise any subsequent
                                        influence over the amount of Shares to
                                        be sold hereunder to generate funds for
                                        the Tax Withholding Obligation or the
                                        price, date or time of such sale.

                                   C.   You are entering into this Agreement in
                                        good faith and have a bona fide
                                        intention to carry out the terms of this
                                        Agreement, and you will not enter into
                                        or alter a corresponding or hedging
                                        transaction or position with respect to
                                        the Shares.

                                   (ii)By Share Withholding. If so elected in
                                   the sole discretion of the Committee, then in
                                   lieu of a market sale pursuant to Paragraph
                                   9(b)(i) you authorize the Company to withhold
                                   from the Shares issuable to you the whole
                                   number of shares with a value equal to the
                                   Fair Market Value of the Shares on the
                                   Taxable Date or the first trading day before
                                   the Taxable Date, sufficient to satisfy the
                                   applicable Tax Withholding Obligation. You
                                   acknowledge that the withheld shares may not
                                   be sufficient to satisfy your Tax Withholding
                                   Obligation. Accordingly, you agree to pay to
                                   the Company as soon as practicable, including
                                   through additional payroll withholding, any
                                   amount of the Tax Withholding Obligation that
                                   is not satisfied by the withholding of Shares
                                   described above.

                                       3

<PAGE>

10. DATA PRIVACY              As an essential term of this Agreement, you
                              consent to the collection, use and transfer, in
                              electronic or other form, of personal data as
                              described in this Agreement for the exclusive
                              purpose of implementing, administering and
                              managing your participation in the Plan.

                              By entering into this Agreement and accepting the
                              Restricted Stock Units, you acknowledge that the
                              Company holds certain personal information about
                              you, including, but not limited to, your name,
                              home address and telephone number, date of birth,
                              social insurance number or other identification
                              number, salary, tax rates and amounts,
                              nationality, job title, any shares of stock or
                              directorships held in the Company, details of all
                              awards or any other entitlement to shares of stock
                              awarded, canceled, exercised, vested, unvested or
                              outstanding, for the purpose of implementing,
                              administering and managing the Plan ("Data"). You
                              acknowledge that Data may be transferred to any
                              third parties assisting in the implementation,
                              administration and management of the Plan, that
                              these recipients may be located in jurisdictions
                              that may have different data privacy laws and
                              protections, and you authorize the recipients to
                              receive, possess, use, retain and transfer the
                              Data, in electronic or other form, for the
                              purposes of implementing, administering and
                              managing the Plan, including any requisite
                              transfer of such Data as may be required to a
                              broker or other third party with whom you or the
                              Company may elect to deposit any shares of stock
                              acquired under this Agreement. You acknowledges
                              that Data may be held only as long as is necessary
                              to implement, administer and manage your
                              participation in the Plan as determined by the
                              Company, and that you may request additional
                              information about the storage and processing of
                              Data, require any necessary amendments to Data or
                              refuse or withdraw the consents herein, in any
                              case without cost, provided however, that refusing
                              or withdrawing your consent may adversely affect
                              your ability to participate in the Plan.

11. ELECTRONIC DELIVERY       The Company may, in its sole discretion, decide to
                              deliver any documents related to any awards
                              granted under the Plan by electronic means or to
                              request your consent to participate in the Plan by
                              electronic means. You hereby consent to receive
                              such documents by electronic delivery and, if
                              requested, to agree to participate in the Plan
                              through an on-line or electronic system
                              established and maintained by the Company or
                              another third party designated by the Company, and
                              such consent shall remain in effect throughout
                              your term of employment or service with the
                              Company and thereafter until withdrawn in writing
                              by you.

12. MISCELLANEOUS             (a)  This Agreement shall not confer upon you any
                                   right to continue as an employee, or
                                   otherwise in the service of, the Company or
                                   any Affiliate, nor shall this Agreement
                                   interfere in any way with the Company's or
                                   such Affiliate's right to terminate your
                                   employment or service at any time.

                              (b)  Without limiting the generality of Paragraph
                                   12(a) above, this Agreement and the Plan may
                                   be amended without your consent to the extent
                                   provided in Section 14(b) of the Plan.

                              (c)  This Agreement will be subject to all
                                   applicable laws, rules, and regulations, and
                                   to such approvals by any governmental
                                   agencies or stock exchanges as may be
                                   required. The Company may impose such
                                   restrictions, conditions or limitations as it
                                   determines appropriate as to the timing and
                                   manner of any resales by you or other
                                   subsequent transfers by you of any shares of
                                   Common Stock issued as a result of or under
                                   this Agreement, including without limitation
                                   (i) restrictions under an insider trading
                                   policy, (ii) restrictions that may be
                                   necessary in the absence of an effective
                                   registration statement under the Securities
                                   Act of 1933, as amended, covering the
                                   Restricted Stock Units and (iii) restrictions
                                   as to the use of a specified brokerage firm
                                   or other agent for such resales or other
                                   transfers. Any sale of shares of Common Stock
                                   issued pursuant to this Agreement must also
                                   comply with other applicable laws and
                                   regulations governing the sale of such
                                   shares.

                              (d)  To the extent not preempted by U.S. federal
                                   law, this Agreement shall be governed by, and
                                   construed in accordance with, the laws of the
                                   State of Delaware.

                              (e)  Any question concerning the interpretation of
                                   this Agreement or the Plan, any adjustments
                                   required to be made under the Plan, and any
                                   controversy that may arise under the Plan or
                                   this Agreement shall be determined by the
                                   Committee (including any person(s) to whom
                                   the Committee has delegated its authority) in
                                   its sole and absolute discretion. Such
                                   decision by the Committee shall be final and
                                   binding.

13. SIGNATURES                By the signatures below, you and the authorized
                              representative of the Company acknowledge
                              agreement to this Restricted Stock Unit Award
                              Agreement as of the Grant Date specified above.

                                       4

<PAGE>

                  PARTICIPANT:       FAIRCHILD SEMICONDUCTOR INTERNATIONAL, INC.

                  _________________  /s/ Mark S. Thompson
                                     ------------------------------------
                                     Mark S. Thompson
                                     President and CEO

TO ACCEPT YOUR RESTRICTED STOCK UNIT GRANT:

      (a)   Sign BOTH copies of this Restricted Stock Unit Award Agreement;

      (b)   Retain one copy of each for your records;

      (c)   Return one copy of each in the enclosed envelope by WITHIN 30 DAYS
            OF THE GRANT DATE.

                                       5CONSULTING AGREEMENT

     THIS CONSULTING AGREEMENT (this "Agreement"), entered into as of the 8th
day of May, 2006 (the "Effective Date"), by and between VION PHARMACEUTICALS,
INC., a Delaware corporation having offices at Four Science Park, New Haven,
Connecticut 06511 (the "Corporation") and MARIO SZNOL, M.D., an individual
having an office at 186 Rimmon Rd., Woodbridge, CT 06525 ("Consultant").

     In consideration of the services provided hereunder for the Corporation by
Consultant, Consultant and the Corporation hereby agree as follows:

     1. Consulting Services. Consultant shall work on a day-to-day basis with
the Clinical Affairs group of the Corporation. Consultant shall report to the
Chief Executive Officer and shall perform such consulting services for the
Corporation as may be requested by the Chief Executive Officer, including, but
not limited to, the following:

     (a) Participating in the review of data derived from the pre-clinical and
clinical development programs and assisting in the preparation of reports and
publications; and

     (b) Participating in meetings with the U.S. Food and Drug Administration
and with Canadian and European regulatory authorities, assisting the Corporation
in its preparation for ODAC reviews.

     All such consulting services are collectively referred to herein as the
"Services". Consultant shall provide Services on a per diem basis during the
term of this Agreement, such days to be at the mutual convenience of the
Corporation and Consultant. Consultant shall be available for consultation with
the Corporation by correspondence or telephone, and, when necessary, by meetings
at such times and locations, including the Corporation's offices in New Haven,
Connecticut, as may be reasonably requested by the Corporation.

     2. Term. The term of this Agreement shall commence on the Effective Date
and expire on December 31, 2008. The term of this Agreement may be extended by
mutual agreement of the parties. Notwithstanding the foregoing, this Agreement
may be terminated at any time by the Corporation or Consultant by giving written
notice to the other party. Upon termination, the Consultant shall not incur any
further time charges or expenses on behalf of the Corporation and the
Corporation shall be obligated to pay time charges and expenses incurred prior
to termination subject to the limitations in this Agreement. Notwithstanding any
termination of this Agreement, the obligations of Consultant under Sections 4
and 5 hereof shall survive any such termination.

     3. Compensation. In consideration of the Services performed by Consultant
hereunder, Consultant shall receive compensation as follows:

     (a)  The Corporation shall pay Consultant the sum of One Thousand Five
          Hundred Dollars ($1,500.00) per full day of service. For purposes of
          this Agreement, a "full day" shall be deemed to mean any eight hour
          period of service. Fees shall be prorated for any period of less than
          eight hours at the rate of $187.50 per hour.

                                       1

     (b)  The Corporation shall reimburse Consultant for reasonable
          out-of-pocket travel, hotel and other business expenses incurred at
          the request of the Corporation as soon as practicable following
          submission of statements of expenses incurred, accompanied by
          appropriate supporting documentation, but no more than thirty (30)
          days following such submission.

     4. Confidential Information. Consultant acknowledges that during the term
of this Agreement, he may be exposed to secret and confidential information of
the Corporation and those of other companies with whom the Corporation does
business on a confidential basis. While such information will normally be marked
as confidential, Consultant realizes that all information about unreleased
products and other non-public information about the Corporation is a valuable
trade secret of the Corporation, disclosure of which could severely damage the
economic interests of the Corporation. Confidential information shall also
include the Corporation's proprietary products and drug-delivery techniques,
reports, interpretations, forecasts, records, trade secrets, strategies,
studies, data and know-how, techniques, marketing plans and opportunities, cost
and pricing data, customer lists, developments, improvements, discoveries,
technologies, processes, research, methods, procedures, designs, models, testing
systems, assays, compounds, molecules, organisms, computer software and programs
(including source code and related documentation), test, trial and/or
experimental data and results, laboratory notebooks, drawings and technical
information and materials. Consultant agrees not to disclose such confidential
information, either during the term of this Agreement or at any time thereafter,
to any person not employed by the Corporation, or not engaged to render services
to the Corporation, except with the prior written consent of the Board of
Directors of the Corporation, or if such information is required to be disclosed
because of subpoena or other requirement of law, until such time as the
information becomes public knowledge through no fault of their own. The
agreement made in this paragraph 4 shall be in addition to, and not in
limitation or derogation of, any obligations otherwise imposed by law or by
separate agreement upon Consultant in respect of confidential information of the
Corporation.

     Consultant hereby acknowledges that the Corporation would be irreparably
damaged if such information was disclosed to, or utilized on behalf of, others
in competition in any respect with the Corporation or companies in which it
invests, which damage cannot be adequately compensated for by an action at law.
In the event of a breach or threatened breach by Consultant of the provisions
hereof, Consultant agrees that the Corporation shall be entitled to an
injunction restraining them from such breach. Consultant hereby waives any right
to object to the Corporation's efforts to obtain such an injunction. Nothing
herein contained shall be construed as prohibiting the Corporation from pursing
any other remedies available at law or in equity for any breach or threatened
breach of this Agreement.

     Consultant hereby acknowledges that confidential, non-public information is
"inside information" under the securities laws of the United States and should
not be provided to any person that may trade in the Corporation's securities.

     5.   Inventions.

     (a) Consultant agrees that the Corporation is the sole owner of all right,
title and interest in all improvements, processes, products, technical
information, discoveries ideas, original works of authorship, developments,
trade secrets and work products and related material

                                       2

that are developed for or in conjunction with, or paid for by, the Corporation
in connection with the performance of any Services provided by Consultant before
or after the date hereof (collectively, "Consultant Inventions"). Consultant
shall promptly disclose to the Corporation any and all Consultant Inventions,
whether or not patentable, which Consultant conceives or makes, solely or
jointly, within the term of this Agreement and which are related specifically to
Services rendered under this Agreement, or as a result of the receipt of
confidential information from the Corporation;

     (b) Consultant shall promptly grant, assign and convey to the Corporation
(or its designee) all his rights in and to such Consultant Inventions, and, upon
request, at the Corporation's expense, promptly execute all applications,
assignments or other instruments which the Corporation (or its designee) shall
deem necessary in order to apply for and obtain invention rights, patents,
patent applications, letters patent, copyrights and reissues thereof ("Rights")
in the Untied States and foreign countries on said Consultant Inventions, in
order to assign and convey to the Corporation (or its designee) the sole and
exclusive rights, title and interest in and to Consultant's right in and to said
Consultant Inventions and Rights;

     (c) The Corporation (or its designee) will bear the cost of patent
applications and assignments and the cost of prosecution of all such patent
applications in the Untied States Patent Office and in the patent offices of
foreign countries; and

     (d) Consultant shall render to the Corporation (and its designee) other
assistance as it may require in the prosecution of Rights, in the prosecution or
defense of interferences which may be declared involving any of said Rights, and
in any litigation in which the Corporation may be involved relating to such
Rights, provided that Consultant shall be entitled to additional compensation,
at an hourly fee reasonable and customary for a consultant of similar experience
and qualifications, for any consultation or testimony provided pursuant to this
Section 5(d).

     6. Competitive Employment. The Corporation acknowledges that Consultant is
free to provide consulting services or pursue employment or business
opportunities with companies, institutions and other entities other than the
Corporation; provided that, such other companies, institutions and other
entities do not compete, either directly or indirectly, with the Corporation.

     7. Representation of Consultant. Consultant represents and warrants that he
is permitted to enter into this Agreement and that the terms of this Agreement
are not inconsistent with and are not in violation of his other contractual
obligations. The Corporation recognizes that Consultant's activities are and
will be subject to the policies, rules and regulations of Yale University
("Institute Policy") and the Corporation agrees that Consultant shall be under
no obligation to perform Services if such performance would conflict with
Institute Policy. In the event of a conflict, Institute Policy shall control.

     8. Independent Contractor. Consultant's relationship with the Corporation
shall be that of an independent contractor, and Consultant shall not be deemed
an employee of the Corporation for any purpose whatsoever.

     9. Indemnification. The Corporation shall hold harmless, indemnify and
defend Consultant against any and all third-party claims, liabilities, losses,
costs or expenses (including reasonable attorney's fees) arising out of or in
connection with the Services under this Agreement unless such claims,
liabilities, losses, costs or expenses arise from an act or omission

                                       3

by Consultant constituting willful misconduct, gross negligence, self dealing or
fraud, or an act or omission the payment of indemnification for which is
prohibited by law.

     10. Notices. Any notice of other communication hereunder shall be in
writing, shall be given either manually or by mail, addressed to the party to be
notified at its address first set forth above, and shall be deemed sufficiently
given as of the third day thereafter. Either party may, by notice to the other,
change its address for receiving such notices and communications.

     11. Assignability. This Agreement shall inure to the benefit of any
assignee of the Corporation, and Consultant specifically agrees on demand to
execute any and all reasonably necessary documents in connection therewith. This
Agreement may not be assigned by Consultant.

     12. Entire Agreement. This Agreement constitutes the entire understanding
of the parties hereto with reference to the subject matter hereof and shall not
be changed or modified except by a written instrument signed by both parties;
provided that, this Agreement shall not supersede the Proprietary Information
and Inventions Agreement, dated February 5, 2001 with respect to Consultants
prior service as an employee of the Corporation.

     13. Governing Law. This Agreement shall be governed by and construed in
accordance with the laws of the State of Connecticut, without regard to its
conflicts of laws principles.

     14. Counterparts. This Agreement may be executed in any number of
counterparts, and each counterpart hereof shall be deemed an original
instrument, but all such counterparts together shall constitute but one
agreement.

     IN WITNESS WHEREOF, this Agreement has been executed by the parties hereto,
as of the day and year first above written.

                                                  VION PHARMACEUTICALS, INC.

                                                  By: /s/ Alan Kessman
                                                      --------------------------
                                                  Name: Alan Kessman
                                                  Title: Chief Executive Officer

                                                  CONSULTANT

                                                  By: /s/ Mario Sznol, MD
                                                      --------------------------
                                                  Name: MARIO SZNOL, MD

                                       4

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