Exhibit
4.5

    


    FORM
OF COMMON STOCK PURCHASE WARRANT

    


    GENTA
INCORPORATED

    


    
      
        	
                Warrant
      Shares: [___]

              	
                Initial
      Exercise Date: [___], 20091

              
	 
      	
                Issue
      Date: [___], 2009

              


      

    

    


    THIS
COMMON STOCK PURCHASE WARRANT (the “Warrant”) certifies
that, for value received, [___] (the “Holder”) is entitled,
upon the terms and subject to the limitations on exercise and the conditions
hereinafter set forth, at any time on or after [___], 2009 (the “Initial Exercise
Date”) and on or prior to the close of business on the five (5) year
anniversary of the Initial Exercise Date (the “Termination Date”)
but not thereafter, to subscribe for and purchase from Genta Incorporated, a
Delaware corporation (the “Company”), up to
[___] shares (the “Warrant Shares”) of
Common Stock. The purchase price of one share of Common Stock under this Warrant
shall be equal to the Exercise Price, as defined in Section 2(b).

    


    Section 1. Definitions.
Capitalized terms used and not otherwise defined herein shall have the meanings
set forth in that certain Securities Purchase Agreement (the “Purchase Agreement”),
dated [___], 2009, among the Company and the purchasers signatory
thereto.

    


    Section 2. Exercise.

    


    (a) Exercise of Warrant.
Exercise of the purchase rights represented by this Warrant may be made, in
whole or in part, at any time or times on or after the Initial Exercise Date and
on or before the Termination Date by delivery to the Company of a duly executed
facsimile copy of the Notice of Exercise Form annexed hereto (or such other
office or agency of the Company as it may designate by notice in writing to the
registered Holder at the address of the Holder appearing on the books of the
Company); and, within 3 Trading Days of the date said Notice of Exercise is
delivered to the Company, the Company shall have received payment of the
aggregate Exercise Price of the shares thereby purchased by wire transfer or
cashier’s check drawn on a United States bank. Notwithstanding anything herein
to the contrary, the Holder shall not be required to physically surrender this
Warrant to the Company until the Holder has purchased all of the Warrant Shares
available hereunder and the Warrant has been exercised in full, in which case,
the Holder shall surrender this Warrant to the Company for cancellation within 3
Trading Days of the date the final Notice of Exercise is delivered to the
Company. Partial exercises of this Warrant resulting in purchases of a portion
of the total number of Warrant Shares available hereunder shall have the effect
of lowering the outstanding number of Warrant Shares purchasable hereunder in an
amount equal to the applicable number of Warrant Shares purchased. The Holder
and the Company shall maintain records showing the number of Warrant Shares
purchased and the date of such purchases. The Company shall deliver any
objection to any Notice of Exercise Form within 1 business day of receipt of
such notice. In the event of any dispute or discrepancy, the records of the
Holder shall be controlling and determinative in the absence of manifest error.
The Holder and any assignee,
by acceptance of this
Warrant, acknowledge and agree that, by reason of the provisions of this paragraph,
following the purchase of a portion of the Warrant Shares hereunder, the number
of Warrant Shares available for purchase hereunder at any given time may be
less than the amount
stated on the face hereof. For purposes of clarity, if at any time during
the term of this Warrant, there is not an effective Registration Statement
registering the Warrant Shares, then the Company shall have the right to issue
unregistered shares hereunder.

    


    (b) Exercise Price. The
exercise price per share of the Common Stock under this Warrant shall be $[___]
per share, subject to adjustment hereunder (the “Exercise
Price”).

    


    (c) Cashless Exercise. If
there is no effective Registration Statement registering, or no current
prospectus available for, the resale of the Warrant Shares by the Holder, then
this Warrant may also be exercised at such time by means of a “cashless
exercise” in which the Holder shall be entitled to receive a certificate for the
number of Warrant Shares equal to the quotient obtained by dividing [(A-B) (X)]
by (A), where:

    


    (A)   =
the Daily VWAP on the Trading Day immediately preceding the date of such
election;

    ____________


    1           Six
months following the issue date.


    
      
         


      

      
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    “Daily
VWAP” means, for any date, (i) the daily volume weighted average price of the
Common Stock for such date on the principal Trading Market for the Common Stock
as reported by Bloomberg Financial L.P. (based on a Trading Day from 9:30 a.m.
Eastern Time to 4:02 p.m. Eastern Time); (ii) if the Common Stock is not then
listed or quoted on a Trading Market and if prices for the Common Stock are then
reported in the “Pink Sheets” published by the Pink Sheets, LLC (or a similar
organization or agency succeeding to its functions of reporting prices), the
most recent bid price per share of the Common Stock so reported; or (iii) in all
other cases, the most recent quoted bid price and if not available, the average
midpoint of the last bid or ask prices from at least 3 investment bankers
engaged for purposes of determining the Daily VWAP.

    


    “Trading
Day” means: (a) a day on which the Common Stock is traded on a Trading Market,
or (b) if the Common Stock is not traded on a Trading Market, a day on which the
Common Stock is quoted in the over-the-counter market as reported by the
National Quotation Bureau Incorporated (or any similar organization or agency
succeeding its functions of reporting prices); provided, however, that in the
event that the Common Stock is not listed or quoted as set forth in (a) or (b)
hereof, then Trading Day shall mean any day except Saturday, Sunday and any day
which shall be a legal holiday or a day on which banking institutions in the
State of New York are authorized or required by law or other government action
to close.

    


    “Trading
Market” means the OTC Bulletin Board, the New York Stock Exchange, the NASDAQ
Capital Markets, the NASDAQ Global Markets, the NASDAQ Global Select Market or
the NYSE Alternext US LLC.

    


    
      
        	
              	
                (B) = 

              	
                the
      Exercise Price of this Warrant, as adjusted;
and

              


      

    

    


    
      
        
          	
                	
                  (X) = 

                	
                  the
      number of Warrant Shares issuable upon exercise of this Warrant in
      accordance with the terms of this Warrant by means of a cash exercise
      rather than a cashless
exercise.

                


        

      

    

    


    
      (d) Exercise
Limitations.

    

    


    (i) Holder’s
Restrictions. The Company shall not effect any exercise of this Warrant,
and a Holder shall not have the right to exercise any portion of this Warrant,
pursuant to Section 2 or otherwise, to the extent that after giving effect to
such issuance after exercise as set forth on the applicable Notice of Exercise,
such Holder (together with such Holder’s Affiliates, and any other person or
entity acting as a group together with such Holder or any of such Holder’s
Affiliates), would beneficially own in excess of the Beneficial Ownership
Limitation (as defined below). For purposes of the foregoing sentence, the
number of shares of Common Stock beneficially owned by such Holder and its
Affiliates shall include the number of shares of Common Stock issuable upon
exercise of this Warrant with respect to which such determination is being made,
but shall exclude the number of shares of Common Stock which would be issuable
upon (A) exercise of the remaining, nonexercised portion of this Warrant
beneficially owned by such Holder or any of its Affiliates and (B) exercise or
conversion of the unexercised or nonconverted portion of any other securities of
the Company (including, without limitation, any other Common Stock Equivalents)
subject to a limitation on conversion or exercise analogous to the limitation
contained herein beneficially owned by such Holder or any of its affiliates.
Except as set forth in the preceding sentence, for purposes of this Section
2(d)(i), beneficial ownership shall be calculated in accordance with Section
13(d) of the Exchange Act and the rules and regulations promulgated thereunder,
it being acknowledged by the Holder that the Company is not representing to such
Holder that such calculation is in compliance with Section 13(d) of the Exchange
Act and such Holder is solely responsible for any schedules required to be filed
in accordance therewith. To the extent that the limitation contained in this
Section 2(d)(i) applies, the determination of whether this Warrant is
exercisable (in relation to other securities owned by such Holder together with
any Affiliates) and of which portion of this Warrant is exercisable shall be in
the sole discretion of the Holder, and the submission of a Notice of Exercise
shall be deemed to be the Holder’s determination of whether this Warrant is
exercisable (in relation to other securities owned by such Holder together with
any Affiliates) and of which portion of this Warrant is exercisable, in each
case subject the Beneficial Ownership Limitation, and the Company shall have no
obligation to verify or confirm the accuracy of such determination. In addition,
a determination as to any group status as contemplated above shall be determined
in accordance with Section 13(d) of the Exchange Act and the rules and
regulations promulgated thereunder. For purposes of this Section 2(d)(i), in
determining the number of outstanding shares of Common Stock, a Holder may rely
on the number of outstanding shares of Common Stock as reflected in (x) the
Company’s most recent Annual Report on Form 10-K or Quarterly Report on Form
10-Q, or such similar form, as the case may be, or (y) any other notice provided
by the Company or the Company’s Transfer Agent within 30 days of the date of
transfer setting forth the number of shares of Common Stock outstanding. Upon
the written or oral request of a Holder, the Company shall within two Trading
Days confirm orally and in writing to such Holder the number of shares of Common
Stock then outstanding. In any case, the number of outstanding shares of Common
Stock shall be determined after giving effect to the conversion or exercise of
securities of the Company, including this Warrant, by such Holder or its
Affiliates since the date as of which such number of outstanding shares of
Common Stock was reported. The “Beneficial Ownership
Limitation” shall be 4.999% of the number of shares of the Common Stock
outstanding immediately after giving effect to the issuance of shares of Common
Stock issuable upon exercise of this Warrant. The provisions of this paragraph
shall be construed and implemented in a manner otherwise than in strict
conformity with the terms of this Section 2(d)(i) to correct this paragraph (or
any portion hereof) which may be defective or inconsistent with the intended
Beneficial Ownership Limitation herein contained or to make changes or
supplements necessary or desirable to properly give effect to such limitation.
The limitations contained in this paragraph shall apply to a successor holder of
this Warrant.


    
      
         


      

      
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      (e) Mechanics of
Exercise.

    

    


    (i) Delivery of Certificates
Upon Exercise. Certificates for shares purchased hereunder shall be
transmitted by the transfer agent of the Company to the Holder by crediting the
account of the Holder’s prime broker with the Depository Trust Company through
its Deposit Withdrawal Agent Commission (“DWAC”) system if the
Company is a participant in such system and there is an effective Registration
Statement permitting the resale of the Warrant Shares by the Holder, and
otherwise by physical delivery to the address specified by the Holder in the
Notice of Exercise within three (3) Trading Days from the receipt by the Company
of the Notice of Exercise Form, surrender of this Warrant and payment of the
aggregate Exercise Price as set forth above (“Warrant Share Delivery
Date”). This Warrant shall be deemed to have been exercised on the date
the Exercise Price is received by the Company, if such date is after Notice of
Exercise Form and this Warrant are received by the Company. The Warrant Shares
shall be deemed to have been issued, and the Holder or any other person so
designated to be named therein shall be deemed to have become a holder of record
of such shares for all purposes, as of the date the Warrant has been exercised
by payment to the Company of the Exercise Price (or by cashless exercise, if
permitted) and all taxes required to be paid by the Holder, if any, pursuant to
Section 2(e)(vi) prior to the issuance of such shares, have been
paid.

    


    (ii)
Delivery of New
Warrants Upon Exercise. If this Warrant shall have been exercised in
part, the Company shall, at the request of a Holder and upon surrender of this
Warrant certificate, at the time of delivery of the certificate or certificates
representing Warrant Shares, deliver to Holder a new Warrant evidencing the
rights of Holder to purchase the unpurchased Warrant Shares called for by this
Warrant, which new Warrant shall in all other respects be identical with this
Warrant.

    


    (iii)
Rescission
Rights. If the Company fails to cause its transfer agent to transmit to
the Holder a certificate or certificates representing the Warrant Shares
pursuant to this Section 2(e)(iii) by the second Trading Day immediately
following the Warrant Share Delivery Date, then the Holder will have the right
to rescind such exercise.

    


    (iv)
Compensation for
Buy-In on Failure to Timely Deliver Certificates Upon Exercise. In
addition to any other rights available to the Holder, if the Company fails to
cause its transfer agent to transmit to the Holder a certificate or certificates
representing the Warrant Shares pursuant to an exercise on or before the Warrant
Share Delivery Date, and if after such date the Holder is required by its broker
to purchase (in an open market transaction or otherwise) or the Holder’s
brokerage firm otherwise purchases, shares of Common Stock to deliver in
satisfaction of a sale by the Holder of the Warrant Shares which the Holder
anticipated receiving upon such exercise (a “Buy-In”), then the
Company shall (1) pay in cash to the Holder the amount by which (x) the Holder’s
total purchase price (including brokerage commissions, if any) for the shares of
Common Stock so purchased exceeds (y) the amount obtained by multiplying (A) the
number of Warrant Shares that the Company was required to deliver to the Holder
in connection with the exercise at issue times (B) the price at which the sell
order giving rise to such purchase obligation was executed, and (2) at the
option of the Holder, either reinstate the portion of the Warrant and equivalent
number of Warrant Shares for which such exercise was not honored or deliver to
the Holder the number of shares of Common Stock that would have been issued had
the Company timely complied with its exercise and delivery obligations
hereunder. For example, if the Holder purchases Common Stock having a total
purchase price of $11,000 to cover a Buy-In with respect to an attempted
exercise of shares of Common Stock with an aggregate sale price giving rise to
such purchase obligation of $10,000, under clause (1) of the immediately
preceding sentence the Company shall be required to pay the Holder $1,000. The
Holder shall provide the Company written notice indicating the amounts payable
to the Holder in respect of the Buy-In and, upon request of the Company,
evidence of the amount of such loss. Nothing herein shall limit a Holder’s right
to pursue any other remedies available to it hereunder, at law or in equity
including, without limitation, a decree of specific performance and/or
injunctive relief with respect to the Company’s failure to timely deliver
certificates representing shares of Common Stock upon exercise of the Warrant as
required pursuant to the terms hereof.


    
      
         


      

      
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    (v) No Fractional Shares or
Scrip. No fractional shares or scrip representing fractional shares shall
be issued upon the exercise of this Warrant. As to any fraction of a share which
Holder would otherwise be entitled to purchase upon such exercise, the Company
shall at its election, either pay a cash adjustment in respect of such final
fraction in an amount equal to such fraction multiplied by the Exercise Price or
round up to the next whole share.

    


    (vi)
Charges, Taxes and
Expenses. Issuance of certificates for Warrant Shares shall be made
without charge to the Holder for any issue or transfer tax or other incidental
expense in respect of the issuance of such certificate, all of which taxes and
expenses shall be paid by the Company, and such certificates shall be issued in
the name of the Holder or in such name or names as may be directed by the
Holder; provided, however, that in the
event certificates for Warrant Shares are to be issued in a name other than the
name of the Holder, this Warrant when surrendered for exercise shall be
accompanied by the Assignment Form attached hereto duly executed by the Holder;
and the Company may require, as a condition thereto, the payment of a sum
sufficient to reimburse it for any transfer tax incidental thereto.

    


    (f) Closing of Books. The
Company will not close its stockholder books or records in any manner which
prevents the timely exercise of this Warrant, pursuant to the terms
hereof.

    


    Section 3. Certain
Adjustments.

    


    (a) Stock Dividends and
Splits. If the Company, at any time while this Warrant is outstanding:
(A) pays a stock dividend or otherwise make a distribution or distributions on
shares of its Common Stock or any other equity or equity equivalent securities
payable in shares of Common Stock (which, for avoidance of doubt, shall not
include any shares of Common Stock issued by the Company upon exercise of this
Warrant), (B) subdivides outstanding shares of Common Stock into a larger number
of shares, (C) combines (including by way of reverse stock split) outstanding
shares of Common Stock into a smaller number of shares, or (D) issues by
reclassification of shares of the Common Stock any shares of capital stock of
the Company, then in each case the Exercise Price shall be multiplied by a
fraction of which the numerator shall be the number of shares of Common Stock
(excluding treasury shares, if any) outstanding immediately before such event
and of which the denominator shall be the number of shares of Common Stock
outstanding immediately after such event and the number of shares issuable upon
exercise of this Warrant shall be proportionately adjusted such that the
aggregate Exercise Price of this Warrant shall remain unchanged. Any adjustment
made pursuant to this Section 3(a) shall become effective immediately after the
record date for the determination of stockholders entitled to receive such
dividend or distribution and shall become effective immediately after the
effective date in the case of a subdivision, combination or
re-classification.

    


    (b) Pro Rata
Distributions. If the Company, at any time while this Warrant is
outstanding, shall distribute to all holders of Common Stock (and not to Holders
of the Warrants) evidences of its indebtedness or assets (including cash and
cash dividends) or rights or warrants to subscribe for or purchase any security
other than the Common Stock, then in each such case the Exercise Price shall be
adjusted by multiplying the Exercise Price in effect immediately prior to the
record date fixed for determination of stockholders entitled to receive such
distribution by a fraction of which the denominator shall be the Daily VWAP
determined as of the record date mentioned above, and of which the numerator
shall be such Daily VWAP on such record date less the then per share fair market
value at such record date of the portion of such assets or evidence of
indebtedness so distributed applicable to one outstanding share of the Common
Stock (determined by dividing the amount distributed by the then issued and
outstanding shares of Common Stock) as determined by the Board of Directors in
good faith. In either case the adjustments shall be described in a statement
provided to the Holder of the portion of assets or evidences of indebtedness so
distributed or such subscription rights applicable to one share of Common Stock.
Such adjustment shall be made whenever any such distribution is made and shall
become effective immediately after the record date mentioned
above.


    
      
         


      

      
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    (c) Fundamental
Transaction. If, at any time while this Warrant is outstanding, (A) the
Company effects any merger or consolidation of the Company with or into another
Person, (B) the Company effects any sale of all or substantially all of its
assets in one or a series of related transactions, (C) any tender offer or
exchange offer (whether by the Company or another Person) is completed pursuant
to which holders of Common Stock are permitted to tender or exchange their
shares for other securities, cash or property, or (D) the Company effects any
reclassification of the Common Stock or any compulsory share exchange pursuant
to which the Common Stock is effectively converted into or exchanged for other
securities, cash or property (each “Fundamental
Transaction”), then, upon any subsequent exercise of this Warrant, the
Holder shall have the right to receive, for each Warrant Share that would have
been issuable upon such exercise immediately prior to the occurrence of such
Fundamental Transaction, the number of shares of Common Stock of the successor
or acquiring corporation or of the Company, if it is the surviving corporation,
and any additional consideration (the “Alternate
Consideration”) receivable as a result of such merger, consolidation or
disposition of assets by a holder of the number of shares of Common Stock for
which this Warrant is exercisable immediately prior to such event. For purposes
of any such exercise, the determination of the Exercise Price shall be
appropriately adjusted to apply to such Alternate Consideration based on the
amount of Alternate Consideration issuable in respect of one share of Common
Stock in such Fundamental Transaction, and the Company shall apportion the
Exercise Price among the Alternate Consideration in a reasonable manner
reflecting the relative value of any different components of the Alternate
Consideration. If holders of Common Stock are given any choice as to the
securities, cash or property to be received in a Fundamental Transaction, then
the Holder shall be given the same choice as to the Alternate Consideration it
receives upon any exercise of this Warrant following such Fundamental
Transaction. To the extent necessary to effectuate the foregoing provisions, any
successor to the Company or surviving entity in such Fundamental Transaction
shall issue to the Holder a new warrant consistent with the foregoing provisions
and evidencing the Holder’s right to exercise such warrant into Alternate
Consideration. The terms of any agreement pursuant to which a Fundamental
Transaction is effected shall include terms requiring any such successor or
surviving entity to comply with the provisions of this Section 3(c) and insuring
that this Warrant (or any such replacement security) will be similarly adjusted
upon any subsequent transaction analogous to a Fundamental
Transaction.

    


    (d) Calculations. All
calculations under this Section 3 shall be made to the nearest cent or the
nearest 1/100th of a share, as the case may be. For purposes of this Section 3,
the number of shares of Common Stock deemed to be issued and outstanding as of a
given date shall be the sum of the number of shares of Common Stock (excluding
treasury shares, if any) issued and outstanding at the close of the Trading Day
on or, if not applicable, most recently preceding, such given date.

    


    (e) Minimum Adjustment.
Notwithstanding anything in this Warrant to the contrary, no adjustment in the
Exercise Price shall be required unless such adjustment would require an
increase or decrease of at least $0.01 per share of Common Stock; provided, however, that any
adjustments which by reason of this Subsection 3(e) are not required to be made
shall be carried forward and taken into account in any subsequent adjustment;
provided, further, however,
that adjustments shall be required and made in accordance with the provisions of
this Section 3 (other than this Subsection 3(e)) not later than such time as may
be required in order to preserve the tax-free nature of a distribution, if any,
to the Holder of this Warrant or the Warrant Shares. Notwithstanding anything in
this Section 3 to the contrary, the Company shall be entitled to make such
reductions in the Exercise Price, in addition to those required by this Section
3, as it in its discretion shall deem to be advisable in order that any stock
dividend, subdivision of shares or distribution of rights to purchase stock or
securities convertible or exchangeable for stock hereafter made by the Company
to its stockholders shall not be taxable.

    


    (f) Notice to
Holder.

    


    
      	
               
      

            	
              (i)

            	
              Adjustment to Exercise
      Price. Whenever the Exercise Price is adjusted pursuant to any
      provision of this Section 3, the Company shall promptly mail to the Holder
      a notice setting forth the Exercise Price after such adjustment and
      setting forth a brief statement of the facts requiring such
      adjustment.

            


    


    
      
         


      

      
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              (ii)

            	
              Notice to Allow
      Exercise by Holder. If (A) the Company shall declare a dividend (or
      any other distribution in whatever form) on the Common Stock; (B) the
      Company shall declare a special nonrecurring cash dividend on or a
      redemption of the Common Stock; (C) the Company shall authorize the
      granting to all holders of the Common Stock rights or warrants to
      subscribe for or purchase any shares of capital stock of any class or of
      any rights; (D) the approval of any stockholders of the Company shall be
      required in connection with any reclassification of the Common Stock, any
      consolidation or merger to which the Company is a party, any sale or
      transfer of all or substantially all of the assets of the Company, of any
      compulsory share exchange whereby the Common Stock is converted into other
      securities, cash or property; (E) the Company shall authorize the
      voluntary or involuntary dissolution, liquidation or winding up of the
      affairs of the Company; then, in each case, the Company shall cause to be
      mailed to the Holder at its last address as it shall appear upon the
      Warrant Register of the Company, at least 20 calendar days prior to the
      applicable record or effective date hereinafter specified, a notice
      stating (x) the date on which a record is to be taken for the purpose of
      such dividend, distribution, redemption, rights or warrants, or if a
      record is not to be taken, the date as of which the holders of the Common
      Stock of record to be entitled to such dividend, distributions,
      redemption, rights or warrants are to be determined or (y) the date on
      which such reclassification, consolidation, merger, sale, transfer or
      share exchange is expected to become effective or close, and the date as
      of which it is expected that holders of the Common Stock of record shall
      be entitled to exchange their shares of the Common Stock for securities,
      cash or other property deliverable upon such reclassification,
      consolidation, merger, sale, transfer or share exchange; provided that the
      failure to mail such notice or any defect therein or in the mailing
      thereof shall not affect the validity of the corporate action required to
      be specified in such notice. Subject to applicable law, the Holder is
      entitled to exercise this Warrant during the period commencing on the date
      of such notice to the effective date of the event triggering such notice.
      Notwithstanding the foregoing, the delivery of the notice described in
      this Section 3(f) is not intended to and shall not bestow upon the Holder
      any voting rights whatsoever with respect to outstanding unexercised
      Warrants.

            


    

    


    Section 4. Transfer of
Warrant.

    


    (a) Transferability. This
Warrant and all rights hereunder (including, without limitation, any
registration rights) are transferable, in whole or in part, upon surrender of
this Warrant at the principal office of the Company or its designated agent,
together with a written assignment of this Warrant substantially in the form
attached hereto duly executed by the Holder or its agent or attorney and funds
sufficient to pay any transfer taxes payable upon the making of such transfer.
Upon such surrender and, if required, such payment, the Company shall execute
and deliver a new Warrant or Warrants in the name of the assignee or assignees
and in the denomination or denominations specified in such instrument of
assignment, and shall issue to the assignor a new Warrant evidencing the portion
of this Warrant not so assigned, and this Warrant shall promptly be cancelled. A
Warrant, if properly assigned, may be exercised by a new holder for the purchase
of Warrant Shares without having a new Warrant issued.

    


    (b) New Warrants. This
Warrant may be divided or combined with other Warrants upon presentation hereof
at the aforesaid office of the Company, together with a written notice
specifying the names and denominations in which new Warrants are to be issued,
signed by the Holder or its agent or attorney. Subject to compliance with
Section 4(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. All Warrants issued on transfers or exchanges shall be dated
the original Issue Date and shall be identical with this Warrant except as to
the number of Warrant Shares issuable pursuant thereto.

    


    (c) Warrant Register. The
Company shall register this Warrant, upon records to be maintained by the
Company for that purpose (the “Warrant Register”),
in the name of the record Holder hereof from time to time. The Company may deem
and treat the registered Holder of this Warrant as the absolute owner hereof for
the purpose of any exercise hereof or any distribution to the Holder, and for
all other purposes, absent actual notice to the contrary.

    


    Section 5. Investment Intent; Limited
Transferability.

    


    (a) The
Holder further represents to the Company, by accepting this Warrant, that it has
full power and authority to accept this Warrant and make the representations set
forth herein.

    


    (b) The
Holder agrees and acknowledges that this Warrant may not be sold, transferred,
assigned or hypothecated by the Holder except in compliance with the provisions
of the Securities Act and any applicable State securities or “blue sky”
laws.


    
      
         


      

      
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    Section 6. Miscellaneous.

    


    (a) No Rights as Stockholder
Until Exercise. This Warrant does not entitle the Holder to any voting
rights or other rights as a stockholder of the Company prior to the exercise
hereof. Upon the surrender of this Warrant and the payment of the aggregate
Exercise Price (or by means of a cashless exercise), the Warrant Shares so
purchased shall be and be deemed to be issued to such Holder as the record owner
of such shares as of the close of business on the later of the date of such
surrender and payment.

    


    (b) Loss, Theft, Destruction or
Mutilation of Warrant. The Company covenants that upon receipt by the
Company of evidence reasonably satisfactory to it of the loss, theft,
destruction or mutilation of this Warrant or any stock certificate relating to
the Warrant Shares, and in case of loss, theft or destruction, of indemnity or
security reasonably satisfactory to it (which, in the case of the Warrant, shall
not include the posting of any bond), and upon surrender and cancellation of
such Warrant or stock certificate, if mutilated, the Company will make and
deliver a new Warrant or stock certificate of like tenor and dated as of such
cancellation, in lieu of such Warrant or stock certificate.

    


    (c) Saturdays, Sundays,
Holidays, etc. If the last or appointed day for the taking of any action
or the expiration of any right required or granted herein shall not be a
business day, then such action may be taken or such right may be exercised on
the next succeeding business day.

    


    (d) Authorized
Shares.

    


    Subject
to this Section 6(d), the Company covenants that during the period the Warrant
is outstanding, it will reserve from its authorized and unissued Common Stock a
sufficient number of shares to provide for the issuance of the Warrant Shares
upon the exercise of any purchase rights under this Warrant. The Company further
covenants that its issuance of this Warrant shall constitute full authority to
its officers who are charged with the duty of executing stock certificates to
execute and issue the necessary certificates for the Warrant Shares upon the
exercise of the purchase rights under this Warrant. The Company will take all
such reasonable action as may be necessary to assure that such Warrant Shares
may be issued as provided herein without violation of any applicable law or
regulation, or of any requirements of the Trading Market upon which the Common
Stock may be listed. The Company covenants that all Warrant Shares which may be
issued upon the exercise of the purchase rights represented by this Warrant
will, upon exercise of the purchase rights represented by this Warrant, be duly
authorized, validly issued, fully paid and nonassessable and free from all
taxes, liens and charges created by the Company in respect of the issue thereof
(other than taxes in respect of any transfer occurring contemporaneously with
such issue).

    


    Except
and to the extent as waived or consented to by the Holder, the Company shall not
by any action, including, without limitation, amending its certificate of
incorporation or through any reorganization, transfer of assets, consolidation,
merger, dissolution, issue or sale of securities or any other voluntary action,
avoid or seek to avoid the observance or performance of any of the terms of this
Warrant, but will at all times in good faith assist in the carrying out of all
such terms and in the taking of all such actions as may be necessary or
appropriate to protect the rights of Holder as set forth in this Warrant against
impairment. Without limiting the generality of the foregoing, the Company will
(a) not increase the par value of any Warrant Shares above the amount payable
therefor upon such exercise immediately prior to such increase in par value, (b)
take all such action as may be necessary or appropriate in order that the
Company may validly and legally issue fully paid and nonassessable Warrant
Shares upon the exercise of this Warrant, and (c) use commercially reasonable
efforts to obtain all such authorizations, exemptions or consents from any
public regulatory body having jurisdiction thereof as may be necessary to enable
the Company to perform its obligations under this Warrant.

    


    Before
taking any action which would result in an adjustment in the number of Warrant
Shares for which this Warrant is exercisable or in the Exercise Price, the
Company shall obtain all such authorizations or exemptions thereof, or consents
thereto, as may be necessary from any public regulatory body or bodies having
jurisdiction thereof.


    
      
         


      

      
        7

        
          

        

      

      
         


      

    


    Notwithstanding
the foregoing, this Warrant shall not be exercisable into shares of Common Stock
until the Company has received stockholder approval at its next annual meeting
of stockholders, or, alternatively, at a special meeting of stockholders, but in
no event later than the date that is 105 days from the date on which the first
2009 Note is issued, to: (1) increase the number of shares of our authorized
Common Stock from 6,000,000,000 to at least [___] and to reserve for issuance
shares of our Common Stock sufficient to permit full conversion of all senior
subordinated convertible notes issued on [___], 2009 (the “2009 Notes”) that may
be issued, to allow us to pay interest on all such 2009 Notes in shares of our
common stock and to allow exercise of all warrants that we may issue in
conjunction with the issuance of 2009 Notes; and (2) effect a 1-___
reverse stock split of our common stock.

    


    (e) Jurisdiction. All
questions concerning the construction, validity, enforcement and interpretation
of this Warrant shall be determined in accordance with the provisions of the
Purchase Agreement.

    


    (f) Nonwaiver and
Expenses. No course of dealing or any delay or failure to exercise any
right hereunder on the part of Holder shall operate as a waiver of such right or
otherwise prejudice Holder’s rights, powers or remedies, notwithstanding the
fact that all rights hereunder terminate on the Termination Date. If the Company
willfully and knowingly fails to comply with any provision of this Warrant,
which results in any material damages to the Holder, the Company shall pay to
Holder such amounts as shall be sufficient to cover any costs and expenses
including, but not limited to, reasonable attorneys’ fees, including those of
appellate proceedings, incurred by Holder in collecting any amounts due pursuant
hereto or in otherwise enforcing any of its rights, powers or remedies
hereunder.

    


    (g) Notices. Any notice,
request or other document required or permitted to be given or delivered to the
Holder by the Company shall be delivered in accordance with the notice
provisions of the Purchase Agreement.

    


    (h) Limitation of
Liability. No provision hereof, in the absence of any affirmative action
by Holder to exercise this Warrant to purchase Warrant Shares, and no
enumeration herein of the rights or privileges of Holder, shall give rise to any
liability of Holder for the purchase price of any Common Stock or as a
stockholder of the Company, whether such liability is asserted by the Company or
by creditors of the Company.

    


    (i) Remedies. Holder, in
addition to being entitled to exercise all rights granted by law, including
recovery of damages, will be entitled to specific performance of its rights
under this Warrant. The Company agrees that monetary damages would not be
adequate compensation for any loss incurred by reason of a breach by it of the
provisions of this Warrant and hereby agrees to waive and not to assert the
defense in any action for specific performance that a remedy at law would be
adequate.

    


    (j) Successors and
Assigns. Subject to applicable securities laws, this Warrant and the
rights and obligations evidenced hereby shall inure to the benefit of and be
binding upon the successors of the Company and the successors and permitted
assigns of Holder. The provisions of this Warrant are intended to be for the
benefit of all Holders from time to time of this Warrant and shall be
enforceable by any such Holder or holder of Warrant Shares.

    


    (k) Amendment. This
Warrant may be modified or amended or the provisions hereof waived with the
written consent of the Company and the Holder.

    


    (l) Severability.
Wherever possible, each provision of this Warrant shall be interpreted in such
manner as to be effective and valid under applicable law, but if any provision
of this Warrant shall be prohibited by or invalid under applicable law, such
provision shall be ineffective to the extent of such prohibition or invalidity,
without invalidating the remainder of such provisions or the remaining
provisions of this Warrant.

    


    (m) Headings. The
headings used in this Warrant are for the convenience of reference only and
shall not, for any purpose, be deemed a part of this Warrant.

    


    **     **     **     **     **


    
      
         


      

      
        8

        
          

        

      

      
         


      

    


    IN
WITNESS WHEREOF, the Company has caused this Warrant to be executed by its
officer thereunto duly authorized as of the date first above
indicated.

    


    
      
        	
                GENTA
      INCORPORATED

              
	 
      	 
      
	
                By:

              	
                  

              
	 
      	
                Name:
      Raymond P. Warrell, Jr., M.D.

              
	 
      	
                Title:
      Chief Executive Officer

              


      

    


    
      
         


      

      
        9

        
          

        

      

      
         


      

    


    NOTICE
OF EXERCISE

    


    TO:
[                                  ]

    


    1. The
undersigned hereby elects to purchase                         
 Warrant Shares of the Company pursuant to the terms of the attached
Warrant (only if exercised in full), and tenders herewith payment of the
exercise price in full, together with all applicable transfer taxes, if
any.

    


    
      2.
Payment
shall take the form of (check applicable box):

    

    


    £ in lawful
money of the United States; or

    


    £ [if permitted]
the cancellation of such number of Warrant Shares as is necessary, in accordance
with the formula set forth in subsection 2(c), to exercise this Warrant with
respect to the maximum number of Warrant Shares purchasable pursuant to the
cashless exercise procedure set forth in subsection 2(c).

    


    3. Please
issue a certificate or certificates representing said Warrant Shares in the name
of the undersigned or in such other name as is specified below:

    


    
      
        

      

    

    


    The
Warrant Shares shall be delivered to the following DWAC Account Number or by
physical delivery of a certificate to:

    


    
      
        

      


      
        

      

    

    


    
      
        

      

    

    


    (4) Accredited Investor.
The undersigned is an “accredited investor” as defined in Regulation D
promulgated under the Securities Act of 1933, as amended.

    


    [SIGNATURE
OF HOLDER]

    


    Name of
Investing Entity:                                                                                                                                                               

    Signature of Authorized Signatory of
Investing Entity:                                                                                                                   

    Name of
Authorized Signatory:                                                                                                       
                           
                   

    Title of
Authorized Signatory:                                                                                                                                   
   
                 

    Date:                                                                                                                                                                                                 


    
      
         


      

      
         


        
          

        

      

      
         


      

    


    ASSIGNMENT
FORM

    


    (To
assign the foregoing warrant, execute

    this form
and supply required information.

    Do not
use this form to exercise the warrant.)

    


    FOR VALUE
RECEIVED, [___] all of or [___] shares of
the foregoing Warrant and all rights evidenced thereby are hereby assigned
to

    


                                                   
 whose address is

    


                                                              
    .

    


                                                              
      

     

    Dated:                                   ,            

    


    Holder’s
Signature:                                                

     

    Holder’s Address:   
                                              


     

                                                      

    
Signature
Guaranteed:                                                                    

    


    NOTE: The
signature to this Assignment Form must correspond with the name as it appears on
the face of the Warrant, without alteration or enlargement or any change
whatsoever, and must be guaranteed by a bank or trust company. Officers of
corporations and those acting in a fiduciary or other representative capacity
should file proper evidence of authority to assign the foregoing
Warrant.