Document:

Form of Warrant for the purchase of common stock

  
 EXHIBIT 10.23 
  
 THIS WARRANT AND THE SECURITIES ISSUABLE UPON EXERCISE HEREOF HAVE NOT BEEN REGISTERED UNDER
THE SECURITIES ACT OF 1933, AS AMENDED, OR ANY APPLICABLE STATE LAWS, AND NO INTEREST THEREIN MAY BE SOLD, DISTRIBUTED, ASSIGNED, OFFERED, PLEDGED OR OTHERWISE TRANSFERRED UNLESS THERE IS AN EFFECTIVE REGISTRATION STATEMENT UNDER SUCH ACT AND
APPLICABLE STATE SECURITIES LAWS COVERING ANY SUCH TRANSACTION, OR SUCH TRANSACTION IS EXEMPT FROM THE REGISTRATION REQUIREMENTS OF SUCH ACT AND LAWS, SUCH COMPLIANCE, AT THE OPTION OF THE CORPORATION, TO BE EVIDENCED BY AN OPINION OF THE WARRANT
HOLDER’S COUNSEL, ACCEPTABLE TO THE CORPORATION, THAT NO VIOLATION OF SUCH REGISTRATION PROVISIONS WOULD RESULT FROM ANY PROPOSED TRANSFER OR ASSIGNMENT. 
  

COMMON STOCK PURCHASE WARRANT 
  
 DUSKA THERAPEUTICS, INC. 
  
 THIS CERTIFIES that for good and valuable consideration received, CATO HOLDING COMPANY or a registered assignee (the “Holder”) is
entitled, upon the terms and subject to the conditions hereinafter set forth, to acquire from Duska Therapeutics, Inc., a Nevada corporation (the “Corporation”), up to
                             fully paid and nonassessable shares of common stock, par value $0.001, of
the Corporation (“Warrant Stock”) at a purchase price per share (the “Exercise Price”) of $2.50 (the “Warrant”). 
  

	1.	Term of Warrant. 

  
 Subject to the terms and conditions set forth herein, this Warrant shall be exercisable, in whole or in part, at any time on or after the date hereof and
at or prior to 11:59 p.m., Pacific Standard Time, on August 29, 2007 (the “Expiration Time”). Notwithstanding the foregoing, the Corporation shall have the right (the “Call Right”), except as may be limited by law,
other agreements or herein, to repurchase this Warrant if the average closing price for the Corporation’s common stock, as quoted on the principal trading system on which the common stock is listed (such as the OTC Bulletin Board, The Nasdaq
Stock Market, any stock exchange, or other established over-the-counter quotation service), is equal to or greater than $4.00 per share, as adjusted pursuant to Section 11 hereof, during the period of the twenty (20) consecutive trading days prior
to the date on which the Corporation elects to exercise the Call Right. The price at which the Corporation is entitled to exercise the Call Right (the “Repurchase Price”) shall be equal to the multiple of (i) $0.01 times (ii) the
number of shares of Warrant Stock that this Warrant is then entitled to purchase. In the event that the Corporation exercises its Call Right, the Corporation shall send the Holder written notice of the exercise of the Call Right 20 calendar days
before the repurchase becomes effective. The Holder shall have the right to exercise this Warrant until the close of business on the twentieth (20th) day after the mailing of the Call Right notice. If this Warrant is not exercised during the foregoing 20-day period, this Warrant shall expire and cease to be exercisable on the twenty-first
(21st) day after the date of mailing of the notice. Within three business days after the expiration of this Warrant
as a result 

  

 
of the exercise of the Call Right, the Corporation shall mail to the Holder a check in the amount of the Repurchase Price. 
  

	2.	Exercise of Warrant. 

  
 The purchase rights represented by this Warrant are exercisable by the registered Holder hereof, in whole or in part, at any time and from time to time at
or prior to the Expiration Time by the surrender of this Warrant and the Notice of Exercise form attached hereto duly executed to the office of the Corporation at Duska Therapeutics, Inc., Two Bala Plaza, Suite 300, Bala Cynwyd, Pennsylvania 19004
(or such other office or agency of the Corporation as it may designate by notice in writing to the registered Holder hereof at the address of such Holder appearing on the books of the Corporation), and upon payment of the Exercise Price for the
shares thereby purchased (by cash or by check or bank draft payable to the order of the Corporation or by cancellation of indebtedness of the Corporation to the Holder hereof, if any, at the time of exercise in an amount equal to the purchase price
of the shares thereby purchased); whereupon the Holder of this Warrant shall be entitled to receive from the Corporation a stock certificate in proper form representing the number of shares of Warrant Stock so purchased. 
  

	3.	Issuance of Shares; No Fractional Shares of Scrip. 

  
 Certificates for shares purchased hereunder shall be delivered to the Holder hereof by the Corporation’s transfer agent at the Corporation’s
expense within a reasonable time after the date on which this Warrant shall have been exercised in accordance with the terms hereof. Each certificate so delivered shall be in such denominations as may be requested by the Holder hereof and shall be
registered in the name of such Holder or, subject to applicable laws, such other name as shall be requested by the Holder. If, upon exercise of this Warrant, fewer than all of the shares of Warrant Stock evidenced by this Warrant are purchased prior
to the Expiration Time, one or more new warrants substantially in the form of, and on the terms in, this Warrant will be issued for the remaining number of shares of Warrant Stock not purchased upon exercise of this Warrant. The Corporation hereby
represents and warrants that all shares of Warrant Stock which may be issued upon the exercise of this Warrant will, upon such exercise, be duly and validly authorized and issued, fully paid and nonassessable and free from all taxes, liens and
charges in respect of the issuance thereof (other than liens or charges created by or imposed upon the Holder of the Warrant Stock). The Corporation agrees that the shares so issued shall be and will be deemed to be issued to such Holder as the
record owner of such shares as of the close of business on the date on which this Warrant shall have been surrendered for exercise in accordance with the terms hereof. No fractional shares or scrip representing fractional shares shall be issued upon
the exercise of this Warrant. With respect to any fraction of a share called for upon the exercise of this Warrant, an amount equal to such fraction multiplied by the then current price at which each share may be purchased hereunder shall be paid in
cash to the Holder of this Warrant. 
  

	4.	Registration Rights. 

  
 Pursuant to the terms of the Subscription Agreement and Exhibit B thereto signed in connection with this Warrant, certain registration rights apply after
June 30, 2004 to the Warrant Stock if registration is (a) requested by the holder of a majority of the then outstanding warrants (including the shares issued upon exercise of these warrants) that were issued as part of the private placement
financing in which this Warrant was issued and certain other securities and (b) 

  

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either (i) the last reported sales price of the common stock of the Corporation, as published by the principal trading market on which such common stock is
then quoted, has exceeded two dollars and fifty cents ($2.50) for twenty (20) consecutive trading days or (ii) if the Corporation is eligible to file a registration statement on Form S-3 with the Securities and Exchange Commission. See the
Subscription Agreement and Exhibit A thereto for a full description of the registration rights applicable to the Warrant Stock and the limitations on such rights. 
  

	5.	Charges, Taxes and Expenses. 

  
 Issuance of certificates for shares of Warrant Stock upon the exercise of this Warrant shall be made without charge to the Holder hereof 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 Corporation, and such certificates shall be issued in the name of the Holder of this Warrant or in such
name or names as may be directed by the Holder of this Warrant; provided, however, that in the event certificates for shares of Warrant Stock are to be issued in a name other than the name of the Holder of this Warrant, this Warrant when surrendered
for exercise shall be accompanied by an Assignment Form to be provided by the Corporation duly executed by the Holder hereof. 
  

	6.	No Rights as Stockholders. 

  
 This Warrant does not entitle the Holder hereof to any voting rights or other rights as a stockholder of the Corporation prior to the exercise hereof.

  

	7.	Exchange and Registry of Warrant. 

  
 This Warrant is exchangeable, upon the surrender hereof by the registered Holder at the above mentioned office or agency of the Corporation, for a new
Warrant of like tenor and dated as of such exchange. The Corporation shall maintain at the above-mentioned office or agency a registry showing the name and address of the registered Holder of this Warrant. This Warrant may be surrendered for
exchange, transfer or exercise, in accordance with its terms, at such office or agency of the Corporation, and the Corporation shall be entitled to rely in all respects, prior to written notice to the contrary, upon such registry. 
  

	8.	Loss, Theft, Destruction or Mutilation of Warrant. 

  
 Upon receipt by the Corporation of evidence reasonably satisfactory to it of the loss, theft, destruction or mutilation of this Warrant and in case of
loss, theft or destruction of indemnity or security reasonably satisfactory to it, and upon reimbursement to the Corporation of all reasonable expenses incidental thereto, and upon surrender and cancellation of this Warrant, if mutilated, the
Corporation will make and deliver a new Warrant of like tenor and dated as of such cancellation, in lieu of this Warrant. 
  

	9.	Saturdays, Sundays and Holidays. 

  
 If the last or appointed day for the taking of any action or the expiration of any right required or granted herein shall be a Saturday or a Sunday or
that is a legal holiday, then such action may be taken or such right may be exercised on the next succeeding day not a Saturday, Sunday or legal holiday. 
  

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	10.	Merger, Sale of Assets, Etc. 

  
 If at any time the Corporation proposes to merge or consolidate with or into any other corporation, effect any reorganization, or sell or convey all or
substantially all of its assets to any other entity, then, as a condition of such reorganization, consolidation, merger, sale or conveyance, the Corporation or its successor, as the case may be, shall enter into a supplemental agreement to make
lawful and adequate provision whereby the Holder shall have the right to receive, upon exercise of the Warrant, the kind and amount of equity securities which would have been received upon such reorganization, consolidation, merger, sale or
conveyance by a Holder of a number of shares of common stock equal to the number of shares issuable upon exercise of the Warrant immediately prior to such reorganization, consolidation, merger, sale or conveyance. If the property to be received upon
such reorganization, consolidation, merger, sale or conveyance is not equity securities, the Corporation shall give the Holder of this Warrant ten (10) business days prior written notice of the proposed effective date of such transaction, and if
this Warrant has not been exercised by or on the effective date of such transaction, it shall terminate. 
  

	11.	Subdivision, Combination, Reclassification, Conversion, Etc. 

  
 If the Corporation at any time shall by subdivision, combination, reclassification of securities or otherwise, change the Warrant Stock into the same or a
different number of securities of any class or classes, this Warrant shall thereafter entitle the Holder to acquire such number and kind of securities as would have been issuable in respect of the Warrant Stock (or other securities which were
subject to the purchase rights under this Warrant immediately prior to such subdivision, combination, reclassification or other change) as the result of such change if this Warrant had been exercised in full for cash immediately prior to such
change. The Exercise Price hereunder shall be adjusted if and to the extent necessary to reflect such change. If the Warrant Stock or other securities issuable upon exercise hereof are subdivided or combined into a greater or smaller number of
shares of such security, the number of shares issuable hereunder shall be proportionately increased or decreased, as the case may be, and the Exercise Price shall be proportionately reduced or increased, as the case may be, in both cases according
to the ratio which the total number of shares of such security to be outstanding immediately after such event bears to the total number of shares of such security outstanding immediately prior to such event. The Corporation shall give the Holder
prompt written notice of any change in the type of securities issuable hereunder, any adjustment of the Exercise Price for the securities issuable hereunder, and any increase or decrease in the number of shares issuable hereunder. 
  

	12.	Transferability; Compliance with Securities Laws. 

  
 (a) This Warrant may not be transferred or assigned in whole or in part without compliance with all applicable federal and state securities laws by the
transferor and transferee (including the delivery of investment representation letters and legal opinions reasonably satisfactory to the Corporation, if requested by the Corporation). Subject to such restrictions, prior to the Expiration Time, this
Warrant and all rights hereunder are transferable by the Holder hereof, in whole or in part, at the office or agency of the Corporation referred to in Section 2 hereof. Any such transfer shall be made in person or by the Holder’s duly
authorized attorney, upon surrender of this Warrant together with the Assignment Form attached hereto properly endorsed. 
  

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 (b) The Holder of this Warrant, by acceptance hereof, acknowledges that this Warrant and the Warrant
Stock issuable upon exercise hereof are being acquired solely for the Holder’s own account and not as a nominee for any other party, and for investment, and that the Holder will not offer, sell or otherwise dispose of this Warrant or any shares
of Warrant Stock to be issued upon exercise hereof except under circumstances that will not result in a violation of the Securities Act of 1933, as amended, or any state securities laws. Upon exercise of this Warrant, the Holder shall, if requested
by the Corporation, confirm in writing, in a form satisfactory to the Corporation, that the shares of Warrant Stock so purchased are being acquired solely for Holder’s own account and not as a nominee for any other party, for investment, and
not with a view toward distribution or resale. 
  
 (c) The Warrant
Stock has not been and will not be registered under the Securities Act of 1933, as amended, and this Warrant may not be exercised except by (i) the original purchaser of this Warrant from the Corporation or (ii) an “accredited investor” as
defined in Rule 501(a) under the Securities Act of 1933, as amended. Each certificate representing the Warrant Stock or other securities issued in respect of the Warrant Stock upon any stock split, stock dividend, recapitalization, merger,
consolidation or similar event, shall be stamped or otherwise imprinted with a legend substantially in the following form (in addition to any legend required under applicable securities laws): 
  
 THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE SECURITIES
ACT OF 1933, AS AMENDED, OR ANY APPLICABLE STATE LAWS, AND NO INTEREST THEREIN MAY BE SOLD, DISTRIBUTED, ASSIGNED, OFFERED, PLEDGED OR OTHERWISE TRANSFERRED UNLESS THERE IS AN EFFECTIVE REGISTRATION STATEMENT UNDER SUCH ACT AND APPLICABLE STATE
SECURITIES LAWS COVERING ANY SUCH TRANSACTION, OR SUCH TRANSACTION IS EXEMPT FROM THE REGISTRATION REQUIREMENTS OF SUCH ACT AND LAWS, SUCH COMPLIANCE, AT THE OPTION OF THE CORPORATION, TO BE EVIDENCED BY AN OPINION OF THE HOLDER’S COUNSEL,
ACCEPTABLE TO THE CORPORATION, THAT NO VIOLATION OF SUCH REGISTRATION PROVISIONS WOULD RESULT FROM ANY PROPOSED TRANSFER OR ASSIGNMENT. 
  

	13.	Representations and Warranties. 

  
 The Corporation hereby represents and warrants to the Holder hereof that: 
  
 (a) during the period that this Warrant is outstanding, the Corporation will reserve from its authorized and unissued common
stock a sufficient number of shares to provide for the issuance of Warrant Stock upon the exercise of this Warrant; 
  
 (b) the issuance of this Warrant shall constitute full authority to the Corporation’s officers who are charged with the duty of executing stock
certificates to execute and issue the necessary certificates for the shares of Warrant Stock issuable upon exercise of this Warrant; 
  
 (c) the Corporation has all requisite legal and corporate power to execute and deliver this Warrant, to sell and issue the Warrant Stock hereunder, and to
carry out and perform its obligations under the terms of this Warrant; 
  

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 (d) all corporate action on the part of the Corporation, its directors and stockholders necessary for the
authorization, execution, delivery and performance of this Warrant by the Corporation, the authorization, sale, issuance and delivery of the Warrant Stock, the grant of registration rights as provided herein and the performance of the
Corporation’s obligations hereunder has been taken; 
  
 (e)
the Warrant Stock, when issued in compliance with the provisions of this Warrant and the Corporation’s Certificate of Incorporation (as they may be amended from time to time), will be validly issued, fully paid and nonassessable, and free of
all taxes, liens or encumbrances with respect to the issue thereof, and will be issued in compliance with all applicable federal and state securities laws; and 
  

(f) the issuance of the Warrant Stock will not be subject to any preemptive rights, rights of first refusal or similar rights. 
  

	14.	Governing Law. 

  
 This Warrant shall be governed by and construed in accordance with the internal laws of the State of Nevada. 
  
 IN WITNESS WHEREOF, the Corporation has caused this Warrant to be executed by
its duly authorized officers. 
  
 Dated: November     ,
2004 
  

			
	DUSKA THERAPEUTICS, INC.
		
	 By:
	 	 
	 	 	Dr. Amir Pelleg, President

  

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 NOTICE OF EXERCISE 
  

	To:	Duska Therapeutics, Inc. 

  

	(1)	The undersigned hereby elects to purchase shares of common stock of Duska Therapeutics, Inc. pursuant to the terms of the attached Warrant and tenders herewith payment of the
purchase price in full, together with all applicable transfer taxes, if any. 

  

	(2)	In exercising this Warrant, the undersigned hereby confirms and acknowledges that the shares of common stock to be issued upon exercise hereof are being acquired solely for the
account of the undersigned and not as a nominee for any other party, and for investment and that the undersigned will not offer, sell or otherwise dispose of any such shares of common stock except under circumstances that will not result in a
violation of the Securities Act of 1933, as amended, or any state securities laws. 

  

	(3)	Please issue a certificate or certificates representing said shares of common stock in the name of the undersigned or in such other name as is specified below:

  
 Please type or print in block letters

  
 ___________________________________________________________________________ 
 (Name)                                      
                       
  
 ___________________________________________________________________________ 
 (Address)                                     
                        
  
 ___________________________________________________________________________ 
  
  
 ___________________________________________________________________________ 
 (Tax I.D.
No.)                                        
                     
  

	(4)	The undersigned represents that (a) he, she or it is the original purchaser from the Corporation of the attached Warrant or an ‘accredited investor’ within the meaning of
Rule 501(a) under the Securities Act of 1933, as amended and (b) the aforesaid shares of common stock are being acquired for the account of the undersigned for investment and not with a view to, or for resale in connection with, the distribution
thereof and that the undersigned has no present intention of distributing or reselling such shares. 

  

			
		
	 Date:
	 	 

  

	
	
	  
	(Signature)

  

 7Form of Warrant for the purchase of common stock

  
 EXHIBIT 10.24 
  
 THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933,
AS AMENDED, AND MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED, PLEDGED OR HYPOTHECATED UNLESS AND UNTIL REGISTERED UNDER SAID ACT OR UNLESS SOLD PURSUANT TO RULE 144 PROMULGATED UNDER SAID ACT, OR UNLESS, IN THE OPINION OF COUNSEL SATISFACTORY
IN FORM AND SUBSTANCE TO THE ISSUER OF THESE SECURITIES, SUCH OFFER, SALE OR TRANSFER, PLEDGE OR HYPOTHECATION IS EXEMPT FROM THE REGISTRATION PROVISIONS OF SAID ACT. 
  
 DUSKA SCIENTIFIC CO. 
  
 WARRANT 
 FOR THE PURCHASE OF COMMON
STOCK 
  
 1. Issuance. For value received, the receipt
of which is hereby acknowledged by Duska Scientific Co., a Delaware corporation (the “Company”),                     , or his or its
assignee pursuant to Section 13 (the “Holder”), is hereby granted the right to purchase, at any time                      (the
“Expiration Date”),
                                        
(            ) fully paid and nonassessable shares (the “Warrant Shares”) of the Company’s common stock, par value $.01 (the “Common Stock”), at the exercise
price of $3.00 per share (the “Exercise Price”), subject in all cases to adjustment as provided in Section 6 hereof. All per share information set forth in this Warrant is stated as prior to a pending 3 for 1 forward split of the
Corporation’s common stock. 
  
 2. Procedure for
Exercise. 
  
 2.1 Exercise of Warrant.
The Holder of this Warrant may exercise this Warrant, in whole or in part, and, upon surrender of this Warrant with the annexed Notice of Exercise Form duly executed, together with payment of the Exercise Price for the shares of Common Stock
purchased, the Holder shall be entitled to receive a certificate or certificates for the shares of Common Stock so purchased. 
  
 2.2 Reissuance of Warrant. In case the Holder shall exercise the Warrant with respect to less than all the Warrant Shares that may
be purchased under this Warrant, the Company shall execute a new Warrant for the balance of the Warrant Shares that may be purchased upon subsequent exercise of this Warrant and deliver such new Warrant to the Holder. 
  
 3. Reservation of Shares. The Company hereby agrees that at all times
during the term of this Warrant there shall be reserved for issuance upon exercise of this Warrant such number of shares of its Common Stock as shall be required for issuance of the Warrant Shares upon exercise of this Warrant and that all Warrant
Shares when issued upon the exercise of this Warrant, and assuming full payment of the Exercise Price, will be validly issued, fully paid and non-assessable. 
  
 4. Mutilation or Loss of Warrant. Upon receipt by the Company of evidence satisfactory to it of the loss, theft, destruction or mutilation of this
Warrant, and (in the case of loss, theft or destruction) receipt of reasonably satisfactory indemnification, and (in the case of mutilation) upon surrender and cancellation of this Warrant, the Company will execute and deliver a new warrant of like
tenor and date and any such lost, stolen, destroyed or mutilated Warrant shall thereupon become void. 
  
 5. No Rights as Shareholder. The Holder shall not, by virtue hereof, be entitled to any rights of a shareholder of the Company, either at law or in
equity, and the rights of the Holder are limited to those expressed in this Warrant and are not enforceable against the Company except to the extent set forth herein. If, 

  

 
however, at any time prior to the expiration of this Warrant and prior to its exercise, any of the following shall occur: 
  
 (a) the Company shall take a record of the holders of its
shares of Common Stock for the purpose of entitling them to receive a dividend or distribution payable otherwise than in cash, or a cash dividend or distribution payable otherwise than out of current or retained earnings (as indicated by the
accounting treatment of such dividend or distribution on the books of the Company) or 
  
 (b) The Company shall offer to the holders of its Common Stock any additional shares of capital stock of the Company or securities
convertible into or exchangeable for shares of capital stock of the Company, or any option, right or warrant to subscribe therefore; or 
  
 (c) there shall be proposed any capital reorganization or reclassification of the Common Stock, or a sale of all or substantially all of
the assets of the Company, or a consolidation or merger of the Company with another entity; or 
  
 (d) there shall be proposed a voluntary or involuntary dissolution, liquidation or winding up of the Company; 
  
 then, in any one or more of said cases, the Company shall cause to be mailed to the Holder,
at the earliest practicable time (and, in any event, not less than ten (10) days before any record date or other date set for definitive action), written notice (“Notice”) of the date on which the books of the Company shall close or a
record shall be taken to determine the shareholders entitled to such dividend, distribution, convertible or exchangeable securities or subscription rights, or entitled to vote on such reorganization, reclassification, sale, consolidation, merger,
dissolution, liquidation or winding up, as the case may be. Such Notice shall also set forth such facts as shall indicate the effect of such action (to the extent such effect may be known at the date of such Notice) on the Exercise Price and the
kind and amount of the Warrant Shares and other securities and property, if any, deliverable upon exercise of this Warrant. Such Notice shall also specify the date as of which the holders of the Common Stock of record shall participate in said
distribution or subscription rights or shall be entitled to exchange their Common Stock for securities or other property deliverable upon such reorganization, reclassification, sale, consolidation, merger, dissolution, liquidation or winding up, as
the case may be (on which date, in the event of voluntary or involuntary dissolution, liquidation or winding up of the Company, the right to exercise this Warrant shall terminate). 
  
 6. Effect of Certain Transactions 
  
 6.1 Adjustments for Stock Splits, Stock Dividends Etc. If the number of outstanding shares of Common
Stock of the Company are increased or decreased by a stock split, reverse stock split, stock dividend, stock combination, reclassification, recapitalization or the like, the Exercise Price and the number of shares purchasable pursuant to this
Warrant shall be adjusted proportionately so that the ratio of (i) the aggregate number of shares of Common Stock purchasable by exercise of this Warrant to (ii) the total number of shares of Common Stock outstanding immediately following such stock
split, reverse stock split, stock dividend, stock combination, recapitalization or the like shall remain unchanged, and the aggregate purchase price of shares of Common Stock issuable pursuant to this Warrant shall remain unchanged. 
  
 6.2 Expiration Upon Certain Transactions. If at any
time the Company engages in a merger or consolidation of the Company in which the Company will not survive and in which holders of the Company’s Common Stock will receive consideration at or above the Exercise Price, as adjusted, then this
Warrant will terminate not less than 10 days from the Holder’s receipt of Notice from the Company as provided for in Section 5. The Notice will inform the Holder of the date that the Warrant will terminate which date shall not be less than 10
days from the Holder’s receipt of the Notice. The Holder may exercise this Warrant within the period set forth in the Notice pursuant to Section 2. 
  

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 6.3 Adjustments for Reorganization, Mergers, Consolidations or Sales of Assets. If
at any time there is a capital reorganization of the Common Stock (other than a recapitalization, combination, or the like provided for elsewhere in this Section 6) or merger or consolidation of the Company with or into another corporation (other
than one covered by Section 6.2), or the sale of all or substantially all of the Company’s properties and assets to any other person, then, as a part of such reorganization, merger, consolidation or sale, provision shall be made so that the
Holder shall thereafter be entitled to receive upon exercise of this Warrant (and only to the extent this Warrant is exercised), the number of shares of stock or other securities or property of the Company, or of the successor corporation resulting
from such merger or consolidation or sale, to which a holder of Common Stock, or other securities, deliverable upon the exercise of this Warrant would otherwise have been entitled on such capital reorganization, merger, consolidation or sale. In any
such case, appropriate adjustments shall be made in the application of the provisions of this Section 6 (including adjustment of the Exercise Price then in effect and number of Warrant Shares purchasable upon exercise of this Warrant) which shall be
applicable after such events. 
  
 6.4
Observance of Duties. The Company will not, by amendment of 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 to be observed or performed hereunder by the Company but will at all times in good faith assist in the carrying out of all the provisions of this Section 6 and in the taking of
all such action as may be necessary or appropriate in order to protect the rights of the Holder of the Warrant against dilution or other impairment. 
  
 7. Transfer to Comply with the Securities Act. This Warrant has not been registered under the Securities Act of 1933, as amended, (the
“Securities Act”) and has been issued to the Holder for investment and not with a view to the distribution of either the Warrant or the Warrant Shares. Except as permitted by Section 13, neither this Warrant nor any of the Warrant Shares
or any other security issued or upon exercise of this Warrant may be sold, transferred, pledged or hypothecated in the absence of an effective registration statement under the Act relating to such security or an opinion of counsel satisfactory in
form and substance to the Company that registration is not required under the Act. Each certificate for the Warrant, the Warrant Shares and any other security issued or issuable upon exercise of this Warrant shall contain a legend in form and
substance satisfactory to counsel for the Company, setting forth the restrictions on transfer contained in this Section. 
  
 8. Notices. Any notice or other communication required or permitted hereunder shall be in writing and shall be delivered personally or sent by
certified, registered or express mail, postage pre-paid. Any such notice shall be deemed given when so delivered personally, or if mailed, two days after the date of deposit in the United States mails, as follows: 
  

							
	 If to Purchaser:
	 	 	 	 	 	 
	 	 	 	 	 	 	 
	 	 	 	 	 	 	 
	 	 	 	 	 	 	 
				
	 If to Company:
	 	 	 	 Duska Scientific Co.
	 	 
	 	 	 	 	 Two Bala Plaza
	 	 
	 	 	 	 	 Suite 300
	 	 
	 	 	 	 	 Bala Cynwyd, PA 19004
	 	 
	 	 	 	 	 Attention: Dr. Amir Pelleg
	 	 

  

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	 With a required copy to:
	 	 	 	 Sanford J. Hillsberg, Esq.
	 	 
	 	 	 	 	 Troy & Gould Professional Corporation
	 	 
	 	 	 	 	 Suite 1600
	 	 
	 	 	 	 	 1801 Century Park East
	 	 
	 	 	 	 	 Los Angeles, CA 90067
	 	 

  
 Any party may
designate another address or person for receipt of notices hereunder by notice given to the other parties in accordance with this Section. 
  
 9. Supplements and Amendments; Whole Agreement. This Warrant may be amended or supplemented only by an instrument in writing signed by the parties
hereto. This Warrant contains the full understanding of the parties hereto with respect to the subject matter hereof, and there are no representations, warranties, agreements or understandings other than expressly contained herein. 
  
 10. Governing Law. This Warrant shall be deemed to be a contract made
under the laws of the State of Delaware and for all purposes shall be governed by and construed in accordance with the laws of such State applicable to contracts to be made and performed entirely within such State. 
  
 11. Counterparts. This Warrant may be executed in any number of
counterparts and each of such counterparts shall for all purposes be deemed to be an original, and all such counterparts shall together constitute but one and the same instrument. 
  
 12. Descriptive Headings. Descriptive headings of the several Sections of this Warrant are inserted for convenience
only and shall not control or affect the meaning or construction of any of the provisions hereof. 
  
 13. Permitted Assignment. Subject to applicable federal and state securities laws, this Warrant or any part thereof may hereafter be assigned by
the Holder (i) by gift to one or more trusts, partnerships or limited liability companies of which such Holder or members of his or her family or the family of his or her spouse are the beneficiaries; (ii) to one or more family members of the Holder
or his or her spouse; or (iii) to direct or indirect business entities that are affiliates of the Holder; provided, however, that any such assignees shall be subject to the restrictions on transfers imposed hereunder to the same extent as the
Holder. 
  
 IN WITNESS WHEREOF, the parties hereto have executed
this Warrant as of                     , 2004. 
  

			
	 DUSKA SCIENTIFIC CO.

		
	 By:
	 	 
	 Name:
	 	 Dr. Amir Pelleg

	 Title:
	 	 President

  

			
	 [name of Investor]

		
	 By:
	 	 
	 Name:
	 	 
	 Title:
	 	 

  

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