Document:

THIS
      WARRANT AND THE SECURITIES ISSUABLE UPON EXERCISE OF THIS WARRANT HAVE NOT
      BEEN
      REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), OR UNDER
      THE SECURITIES LAWS OF ANY APPLICABLE STATES. THESE SECURITIES ARE SUBJECT
      TO
      RESTRICTIONS ON TRANSFERABILITY AND RESALE AND MAY NOT BE TRANSFERRED OR RESOLD
      EXCEPT AS PERMITTED UNDER THE ACT AND THE APPLICABLE STATE SECURITIES LAWS,
      PURSUANT TO REGISTRATION OR EXEMPTION THEREFROM. INVESTORS SHOULD BE AWARE
      THAT
      THEY MAY BE REQUIRED TO BEAR THE FINANCIAL RISKS OF THIS INVESTMENT FOR AN
      INDEFINITE PERIOD OF TIME. THE ISSUER OF THESE SECURITIES MAY REQUIRE AN OPINION
      OF COUNSEL IN FORM AND SUBSTANCE SATISFACTORY TO THE ISSUER TO THE EFFECT THAT
      ANY PROPOSED TRANSFER OR RESALE IS IN COMPLIANCE WITH THE ACT AND ANY APPLICABLE
      STATE SECURITIES LAWS.

     

    WARRANT
      TO PURCHASE COMMON STOCK

    OF

    NEURO-HITECH,
      INC.

    

      
        	
                Warrant
                  No. _____

              	
                Issued
                  on November 29, 2006

              
	 	
                Void
                  after November 29, 2016

              

      

    

     

    This
      certifies that in connection with the Merger Agreement (as defined below),
      _______ is entitled, subject to the terms and conditions of this Warrant, to
      purchase from Neuro-Hitech, Inc., a Delaware corporation (the “Company”),
      at
      any time prior to November 29, 2016 (the “Expiration
      Date”)
      up to
      _________ shares of the Company’s Common Stock, $0.001 par value per share (the
“Common
      Stock”) at
      a
      price per share equal to the Warrant Price (as defined below), upon surrender
      of
      this Warrant at the principal offices of the Company, together with a duly
      executed subscription form in the form attached hereto as Exhibit
      1
      and
      simultaneous payment of the full Warrant Price for the shares of Common Stock
      so
      purchased in lawful money of the United States, or as otherwise provided herein.
      The Warrant Price and the number and character of shares of Common Stock
      purchasable under this Warrant are subject to adjustment as provided
      herein.

     

    This
      Warrant is issued pursuant to the Agreement and Plan of Merger Agreement, dated
      of even date herewith, by and among the Company, QA Acquisition Corp., a
      Delaware corporation, QA Merger LLC, a Delaware limited liability company,
      Q-RNA, Inc., a Delaware corporation and Dr. David Dantzker, as “Representative”
of the Stockholders (the “Merger
      Agreement”),
      and
      is subject to the indemnity provisions set forth in Section 9 of the Merger
      Agreement, which provide for the automatic adjustment of the number of shares
      of
      Common Stock subject to this Warrant in certain circumstances.

     

    1. DEFINITIONS.
      Capitalized terms used in this Warrant and not otherwise defined herein shall
      have the meanings given to them in the Merger Agreement. The following
      definitions shall apply for purposes of this Warrant:

     

    1.1 “Company”
means
      the “Company”
as
      defined above and includes any corporation which shall succeed to or assume
      the
      obligations of the Company under this Warrant.

     

    
      
        
        

      

      
        1

        
          

        

      

      
        
        

      

    

     

    1.2 “Corporate
      Transaction”
shall
      mean (i) an acquisition of the Company by another entity (the “Successor
      Entity”) by means of merger, consolidation or stock sale resulting in the
      disposition of the Common Stock for securities or other consideration issued,
      or
      caused to be issued, by the Successor Entity in which the holders of the Common
      Stock then hold, directly or indirectly, less than fifty percent (50%) of the
      voting securities of the Successor Entity or (ii) a sale by the Company of
      all
      or substantially all of its assets to the Successor Entity in which the holders
      of the Common Stock then hold, directly or indirectly, less than fifty percent
      (50%) of the voting securities of the Successor Entity.

     

    1.3 “Fair
      Market Value”
on
      any
      day shall mean (a) if shares of Common Stock are listed or admitted for trading
      on a national securities exchange, the reported last sales price or, if no
      such
      reported sale occurs on such day, the average of the closing bid and asked
      prices on such day, in each case on the principal national securities exchange
      on which the Common Stock are listed or admitted to trading, (b) if shares
      of
      Common Stock are not listed or admitted to trading on any national securities
      exchange, the average of the closing bid and asked prices in the
      over-the-counter market on such day as reported by Nasdaq or any comparable
      system or, if not so reported, as reported by any New York Stock Exchange member
      firm selected by the Company for such purpose or (c) if no such quotations
      are
      available on such day, the fair market value of one share of Common Stock on
      such day as determined in good faith by the Board of Directors of the
      Company.

     

    1.4 “Holder”
means
      any person who shall at the time be the registered holder of this
      Warrant.

     

    1.5 “Warrant”
means
      this Warrant and any warrant(s) delivered in substitution or exchange therefor,
      as provided herein.

     

    1.6 “Warrant
      Price”
means
      $18.00 per share. The Warrant Price is subject to adjustment as provided
      herein.

     

    2. EXERCISE.

     

    2.1 Timing
      and Method of Exercise.
      

     

    (a) Method
      of Exercise.
      Subject
      to the terms and conditions of this Warrant, the Holder may exercise this
      Warrant on any business day before the Expiration Date for up to _______________
      shares of Common Stock, by surrendering this Warrant at the principal offices
      of
      the Company, with the subscription form attached hereto duly executed by the
      Holder, and payment of an amount equal to the product obtained by multiplying
      (i) the number of shares of Common Stock to be purchased by the Holder by
      (ii) the Warrant Price or adjusted Warrant Price therefor, if applicable,
      as determined in accordance with the terms hereof.

     

    
      
        
        

      

      
        2

        
          

        

      

      
        
        

      

    

     

    (b) Cashless
      Exercise.
      In lieu
      of exercising this Warrant as hereinabove permitted, immediately prior to the
      closing of a Corporate Transaction the Holder may elect to exercise this Warrant
      or a portion hereof and to pay for the Common Stock issuable upon such exercise
      by way of cashless exercise by surrendering this Warrant at the principal
      executive office of the Company, together with the subscription form attached
      hereto electing cashless exercise, in which event the Company shall, immediately
      prior to such closing, issue to the Holder that number of shares of Common
      Stock
      computed using the following formula:

     

    
      	
              X=
                Y
                x (A-B)

            
	
              A

            

    

     

    Where:

     

    X
      equals
      the number of shares of Common Stock to be issued to the Holder;

     

    Y
      equals
      the number of shares of Common Stock purchasable under the Warrant, or, if
      only
      a portion of the Warrant is being exercised, the portion of the Warrant being
      exercised at the date of such calculation;

     

    A
      equals
      the Fair Market Value (at the date of such calculation) of one share of Common
      Stock; and

     

    B
      equals
      the Warrant Price.

     

    2.2 Form
      of Payment.
      Except
      as otherwise provided in Section 2.1(b) above, payment may be made by (i) a
      check payable to the Company’s order, (ii) wire transfer of funds to the
      Company, or (iii) any combination of the foregoing.

     

    2.3 No
      Fractional Shares.
      No
      fractional shares may be issued upon any exercise of this Warrant, and any
      fractions shall be rounded down to the nearest whole number of shares. If upon
      any exercise of this Warrant a fraction of a share results, the Company will
      pay
      the cash value of any such fractional share, calculated on the basis of the
      difference between the Fair Market Value and the Warrant Price.

     

    2.4 Restrictions
      on Exercise.
      This
      Warrant may not be exercised if the issuance of the Warrant Stock upon such
      exercise would constitute a violation of any applicable federal or state
      securities laws or other laws or regulations. As a condition to the exercise
      of
      this Warrant, the Holder shall execute the subscription form attached hereto
      as
Exhibit 1,
      confirming and acknowledging that the representations and warranties made by
      the
      Holder in the “accredited investor” questionnaire described in Section 7.15 of
      the Merger Agreement are true and correct as of the date of
      exercise.

     

    3. ISSUANCE
      OF STOCK.
      This
      Warrant shall be deemed to have been exercised immediately prior to the close
      of
      business on the date of its surrender for exercise as provided above, and the
      person entitled to receive the shares of Common Stock issuable upon such
      exercise shall be treated for all purposes as the holder of record of such
      shares as of the close of business on such date. As soon as practicable on
      or
      after such date, the Company shall issue and deliver to the person or persons
      entitled to receive the same a certificate or certificates for the number of
      whole shares of Warrant Stock issuable upon such exercise.

     

    
      
        
        

      

      
        3

        
          

        

      

      
        
        

      

    

     

    4. ADJUSTMENT
      PROVISIONS.
      The
      number and character of shares of Common Stock issuable upon exercise of this
      Warrant (or any shares of stock or other securities or property at the time
      receivable or issuable upon exercise of this Warrant) and the Warrant Price
      therefor, are subject to adjustment pursuant to the terms of the indemnity
      provisions of the Merger Agreement and upon the occurrence of the following
      events between the date this Warrant is issued and the date it is
      exercised:

     

    4.1 Adjustment
      for Stock Splits and Stock Dividends.
      The
      Warrant Price of this Warrant and the number of shares of Warrant Stock issuable
      upon exercise of this Warrant (or any shares of stock or other securities at
      the
      time issuable upon exercise of this Warrant) shall each be proportionally
      adjusted to reflect any stock dividend, stock split or reverse stock split,
      or
      other similar event affecting the number of outstanding shares of Common Stock
      (or such other stock or securities). 

     

    4.2 Adjustment
      for Other Dividends and Distributions.
      In case
      the Company shall make or issue, or shall fix a record date for the
      determination of eligible holders entitled to receive, a dividend or other
      distribution payable respect to the Common Stock that is payable in
      (a) securities of the Company (other than issuances with respect to which
      adjustment is made under Sections 4.1 or 4.3) or (b) assets (other
      than cash dividends paid or payable solely out of retained earnings), then,
      and
      in each such case, the Holder, upon exercise of this Warrant at any time after
      the consummation, effective date or record date of such event, shall receive,
      in
      addition to the shares of Common Stock issuable upon such exercise prior to
      such
      date, the securities or such other assets of the Company to which the Holder
      would have been entitled upon such date if the Holder had exercised this Warrant
      immediately prior thereto (all subject to further adjustment as provided in
      this
      Warrant).

     

    4.3 Adjustment
      for Reorganization, Consolidation, Merger.
      In case
      of any recapitalization or reorganization of the Company after the date of
      this
      Warrant, or in case, after such date, the Company shall consolidate with or
      merge into another corporation, then, and in each such case, the Holder, upon
      the exercise of this Warrant (as provided in Section 2), at any time after
      the consummation of such recapitalization, reorganization, consolidation or
      merger, shall be entitled to receive, in lieu of the stock or other securities
      and property receivable upon the exercise of this Warrant prior to such
      consummation, the stock or other securities or property to which the Holder
      would have been entitled upon the consummation of such recapitalization,
      reorganization, consolidation or merger if the Holder had exercised this Warrant
      immediately prior thereto, all subject to further adjustment as provided in
      this
      Warrant, and the successor or purchasing corporation in such reorganization,
      consolidation or merger (if other than the Company) shall duly execute and
      deliver to the Holder a supplement hereto acknowledging such corporation’s
      obligations under this Warrant; and in each such case, the terms of this Warrant
      shall be applicable to the shares of stock or other securities or property
      receivable upon the exercise of this Warrant after the consummation of such
      reorganization, consolidation or merger.

     

    
      
        
        

      

      
        4

        
          

        

      

      
        
        

      

    

     

    4.4 Conversion
      of Stock.
      In case
      all the authorized Common Stock of the Company is converted, pursuant to the
      Company’s certificate of incorporation, into other securities or property of the
      Company, or the Common Stock otherwise ceases to exist, then, in such case,
      the
      Holder, upon exercise of this Warrant at any time after the date on which the
      Common Stock is so converted or ceases to exist (the “Termination
      Date”),
      shall
      receive, in lieu of the number of shares of Common Stock that would have been
      issuable upon such exercise immediately prior to the Termination Date (the
      “Former
      Number of Shares of Common Stock”),
      the
      stock and other securities and property which the Holder would have been
      entitled to receive upon the Termination Date if the Holder had exercised this
      Warrant with respect to the Former Number of Shares of Common Stock immediately
      prior to the Termination Date (all subject to further adjustment as provided
      in
      this Warrant).

     

    4.5 Notice
      of Adjustments.
      The
      Company shall promptly give written notice of each adjustment or readjustment
      of
      the Warrant Price or the number of shares of Common Stock or other securities
      issuable upon exercise of this Warrant. The notice shall describe the adjustment
      or readjustment and show in reasonable detail the facts on which the adjustment
      or readjustment is based.

     

    4.6 No
      Change Necessary.
      The
      form of this Warrant need not be changed because of any adjustment in the
      Warrant Price or in the number of shares of Common Stock issuable upon its
      exercise.

     

    4.7 Reservation
      of Stock.
      The
      Company shall at all times reserve and keep available, solely for the issuance
      and delivery upon the exercise of this Warrant, such shares of Common Stock
      and
      other stock, securities and property, as from time to time shall be issuable
      upon the exercise of this Warrant. If
      at any
      time the number of shares of Common Stock or other securities issuable upon
      exercise of this Warrant shall not be sufficient to effect the exercise of
      this
      Warrant, the Company will take such corporate action as may, in the opinion
      of
      its counsel, be necessary to increase its authorized but unissued shares of
      Common Stock or other securities issuable upon exercise of this Warrant as
      shall
      be sufficient for such purpose. All
      shares of Common Stock issued upon exercise of the Warrant shall be validly
      issued, fully paid and nonassessable.

     

    5. NO
      RIGHTS OR LIABILITIES AS STOCKHOLDER.
      This
      Warrant does not by itself entitle the Holder to any voting rights or other
      rights as a stockholder of the Company. In the absence of affirmative action
      by
      the Holder to purchase Common Stock by exercise of this Warrant, no provisions
      of this Warrant, and no enumeration herein of the rights or privileges of the
      Holder, shall cause the Holder to be a stockholder of the Company for any
      purpose.

     

    6. NO
      IMPAIRMENT.
      The
      Company will not, by amendment of its certificate of incorporation or bylaws,
      or
      through reorganization, consolidation, merger, dissolution, issue or sale of
      securities, sale of assets or any other voluntary action, willfully 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 action as may be necessary or appropriate in
      order
      to protect the rights of the holder against wrongful impairment. Without
      limiting the generality of the foregoing, the Company will take all such action
      as may be necessary or appropriate in order that the Company may duly and
      validly issue fully paid and nonassessable shares of Common Stock upon the
      exercise of this Warrant.

     

    
      
        
        

      

      
        5

        
          

        

      

      
        
        

      

    

     

    7. TRANSFER.
      Neither
      this Warrant nor any rights hereunder may be assigned, conveyed or transferred,
      in whole or in part, without the Company’s prior written consent, which the
      Company may withhold in its sole discretion. The rights and obligations of
      the
      Company and the Holder under this Warrant and the Merger Agreement shall be
      binding upon and benefit their respective permitted successors, assigns, heirs,
      administrators and transferees.

     

    8. GOVERNING
      LAW.
      The
      internal laws of the State of Delaware (irrespective of its choice of law
      principles) will govern the validity of this Warrant, the construction of its
      terms, and the interpretation and enforcement of the rights and duties of the
      parties hereto.

     

    9. HEADINGS.
      The
      headings and captions used in this Warrant are used only for convenience and
      are
      not to be considered in construing or interpreting this Warrant. All references
      in this Warrant to sections and exhibits shall, unless otherwise provided,
      refer
      to sections hereof and exhibits attached hereto, all of which exhibits are
      incorporated herein by this reference.

     

    10. NOTICES.
      Any
      notice or other communication required or permitted to be given under this
      Warrant will be in writing, will be delivered personally or by registered or
      certified mail, postage prepaid and will be deemed given upon delivery, if
      delivered personally, or three days after deposit in the mails, if mailed,
      to
      the address indicated for the Holder on the signature page to this Warrant,
      or
      in the case of the Company, at One Penn Plaza, Suite 2514, New York, NY 10119,
      Attn: Chief Financial Officer, or at such other address as any party or the
      Company may designate by giving ten (10) days’ advance written notice to all
      other parties

     

    11. AMENDMENT;
      WAIVER.
      This
      Warrant and all other Warrants issued under the Merger Agreement may be amended
      and provisions may be waived by the Company and the warrant holders of at least
      a majority of the Common Stock underlying the Warrants. Any
      amendment or waiver effected in accordance with this Section shall be binding
      upon the
      Holder and
      each
      future holder of such securities, and the Company.

     

    12. SEVERABILITY.
      If any
      provision of this Warrant, or the application thereof, will for any reason
      and
      to any extent be invalid or unenforceable, the remainder of this Warrant and
      application of such provision to other persons or circumstances will be
      interpreted so as reasonably to effect the intent of the parties hereto. The
      parties further agree to replace such void or unenforceable provision of this
      Agreement with a valid and enforceable provision that will achieve, to the
      extent possible, the economic, business and other purposes of the void or
      unenforceable provision.

     

    13. TERMS
      BINDING.
      By
      acceptance of this Warrant, the Holder accepts and agrees to be bound by all
      the
      terms and conditions of this Warrant.

     

    
      
        
        

      

      
        6

        
          

        

      

      
        
        

      

    

     

    
 

    IN
      WITNESS WHEREOF, the
      parties hereto have executed this Warrant as of the date first above
      written.

    
      	 	 	 
	THE
              COMPANY:	 
	 	 
	
              NEURO-HITECH,
                INC.

            	 
	 	 
	 

              By:

            	 
 	 
 
	
              
                

              

              Name:
                David
                Barrett

            	  	 
	
              Title:
                Chief
                Financial Officer

            	 
	 	 

    

     

    
      
        
        

      

      
        
        

        
          

        

      

      
        
        

      

    

     

    EXHIBIT 1

     

    FORM
      OF SUBSCRIPTION

    (To
      be signed only upon exercise of Warrant)

     

    To:
      Neuro-Hitech, Inc.

     

    (1) The
      undersigned Holder hereby elects to purchase     
        
      shares
      of Common Stock of Neuro-Hitech, Inc. (the “Warrant
      Stock”),
      pursuant to the terms of the attached Warrant, and:

     

    _______
      tenders herewith payment of the purchase price for such shares in full;
      or

     

    _______
      elects cashless exercise pursuant to Section 2.1(b) of the attached
      Warrant.

     

    (Please
      check one)

     

    (2) In
      exercising the Warrant, the undersigned Holder hereby confirms and acknowledges
      that the representations made by the Holder in the “accredited investor”
questionnaire described in Section 7.15 of the Merger Agreement (as defined
      in
      the Warrant) continue to be true and correct as of this date. 

     

    (3) Please
      issue a certificate or certificates representing such shares of Warrant Stock
      in
      the name specified below:

     

    
      	 	 	 
	 	 
	 	
              
                

              

              (Name)

            
	 	 
	 	
              
                

              

              (Address)

            
	 	
            
	 	
              
                

              

              (City,
                State, Zip Code)

            
	 	 
	 	
              

              (Federal
                Tax Identification Number)

            
	 	 
	 	
              
                

              

              (Date)THIS
      WARRANT AND THE SHARES OF COMMON STOCK ISSUABLE UPON EXERCISE OF THIS WARRANT
      HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR ANY
      STATE SECURITIES LAWS. THIS WARRANT AND THE STOCK ISSUABLE UPON EXERCISE OF
      THIS
      WARRANT MAY NOT BE SOLD, OFFERED FOR SALE, PLEDGED OR HYPOTHECATED IN THE
      ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT AS TO THIS WARRANT UNDER SAID
      ACT
      AND ANY APPLICABLE STATE SECURITIES LAWS OR AN OPINION OF COUNSEL REASONABLY
      SATISFACTORY TO NEURO-HITECH, INC. THAT SUCH REGISTRATION IS NOT
      REQUIRED.

     

    NEURO-HITECH,
      INC.

     

    STOCK
      PURCHASE WARRANT

     

    
      	
              Warrant
                No. _____

            	
              Issued
                on November 29, 2006

            
	 	
              Void
                after November 29, 2011

            

    

    

    This
      certifies that in connection with the Purchase Agreement (as defined below),
      _______ (the “Investor”)
      is
      entitled, subject to the terms and conditions of this Warrant, to purchase
      from
      Neuro-Hitech, Inc., a Delaware corporation (the “Company”)
      at any
      time prior to the earlier to occur of (a) a Change of Control or (b) November
      29, 2011 (the “Expiration
      Date”),
      all
      or any portion of the Warrant Shares (as defined below) at the per share
      exercise price set forth below (the “Warrant
      Price”)
      (each
      as adjusted pursuant to Section 4 hereof), subject to the provisions and upon
      the terms and conditions hereinafter set forth, upon surrender of this Warrant
      at the principal offices of the Company, together with a duly executed
      subscription form in the form attached hereto as Exhibit
      1
      and
      simultaneous payment of the full Warrant Price for the shares of Common Stock
      so
      purchased in lawful money of the United States, or as otherwise provided herein.
      

     

    This
      Warrant is issued pursuant to the Securities Purchase Agreement dated of even
      date herewith, by and among the Company and the persons named as Investors
      on
      Schedule A thereto (the “Purchase
      Agreement”),
      and
      is subject to the provisions set forth therein.

     

    1. DEFINITIONS.
      Capitalized terms used in this Warrant and not otherwise defined herein shall
      have the meanings given to them in the Purchase Agreement. The following
      definitions shall apply for purposes of this Warrant:

     

    1.1 “Common
      Stock”
shall
      mean the Common Stock, $0.001 par value, of the Company. 

     

    1.2 “Company”
means
      the “Company”
as
      defined above and includes any corporation which shall succeed to or assume
      the
      obligations of the Company under this Warrant.

     

    
      
        
        

      

      
        
        

        
          

        

      

      
        
        

      

    

    

     

    1.3 “Fair
      Market Value”
of
      the
      Common Stock on any day shall mean (a) if the Common Stock is listed or admitted
      for trading on a national securities exchange, the reported last sales price
      on
      such day or, if no such reported sale occurs on such day, the average of the
      closing bid and asked prices on such day, in each case on the principal national
      securities exchange on which the Common Stock is listed or admitted to trading,
      (b) if the Common Stock is not listed or admitted to trading on any national
      securities exchange, the average of the closing bid and asked prices in the
      over-the-counter market on such day as reported by Nasdaq or any comparable
      system or, if not so reported, as reported by any New York Stock Exchange member
      firm selected by the Company for such purpose or (c) if no such quotations
      are
      available on such day, the fair market value of one share of Common Stock on
      such day, as determined in good faith by the Board of Directors of the
      Company.

     

    1.4 “Holder”
means,
      initially, the Investor and thereafter, any person who shall at the time be
      the
      registered holder of this Warrant.

     

    1.5 “Warrant”
means
      this Warrant and any warrant(s) delivered in substitution or exchange therefor,
      as provided herein.

     

    1.6 “Warrant
      Price”
means
      $7.00 per share. The Warrant Price is subject to adjustment as provided
      herein.

     

    1.7 “Warrant
      Shares”
means
      [50%
      of Shares Purchased].

     

    2. EXERCISE.

     

    2.1 Timing
      and Method of Exercise.
      

     

    (a) Method
      of Exercise.
      Subject
      to the terms and conditions of this Warrant, the Holder may exercise this
      Warrant, on any business day before the Expiration Date, by surrendering this
      Warrant at the principal offices of the Company, with the subscription form
      attached hereto duly executed by the Holder, and payment of an amount equal
      to
      the product obtained by multiplying (i) the number of Warrant Shares to be
      purchased by the Holder by (ii) the Warrant Price or adjusted Warrant Price
      therefor, if applicable, as determined in accordance with the terms
      hereof.

     

    (b) Cashless
      Exercise.
      In lieu
      of exercising this Warrant as hereinabove permitted, the Holder may elect at
      any
      time to exercise this Warrant or a portion hereof and to pay for the Warrant
      Shares issuable upon such exercise by way of cashless exercise by surrendering
      this Warrant at the principal executive office of the Company, together with
      the
      subscription form attached hereto electing cashless exercise, in which event
      the
      Company shall, immediately prior to such closing, issue to the Holder that
      number of Warrant Shares computed using the following formula:

     

    
      	
              X=
                Y
                x (A-B)

            
	
              A

            

    

    
      
        
        

      

      
        2

        
          

        

      

      
        
        

      

    

    Where:

     

    X
      equals
      the number of Warrant Shares to be issued to the Holder;

     

    Y
      equals
      the number of Warrant Shares purchasable under the Warrant, or, if only a
      portion of the Warrant is being exercised, the portion of the Warrant being
      exercised at the date of such calculation;

     

    A
      equals
      the Fair Market Value (at the date of such calculation) of one share of Common
      Stock; and

     

    B
      equals
      the Warrant Price.

     

    2.2 Form
      of Payment.
      Except
      as otherwise provided in Section 2.1(b) above, payment may be made by (i) a
      check payable to the Company’s order, (ii) wire transfer of funds to the
      Company, (iii) surrender of promissory notes or instruments representing
      indebtedness of the Company to the Holder or (iv) any combination of the
      foregoing.

     

    2.3 No
      Fractional Shares.
      No
      fractional shares may be issued upon any exercise of this Warrant, and any
      fractions shall be rounded down to the nearest whole number of shares. If upon
      any exercise of this Warrant a fraction of a share results, the Company will
      pay
      the cash value of any such fractional share, calculated on the basis of the
      difference between the Fair Market Value and the Warrant Price.

     

    2.4 Restrictions
      on Exercise.
      This
      Warrant may not be exercised if the issuance of the Warrant Stock upon such
      exercise would constitute a violation of any applicable federal or state
      securities laws or other laws or regulations. As a condition to the exercise
      of
      this Warrant, the Holder shall execute the subscription form attached hereto
      as
Exhibit 1,
      confirming and acknowledging that the representations and warranties made by
      the
      Holder in Section 4.1 of the Purchase Agreement are true and correct as of
      the date of exercise.

     

    3. ISSUANCE
      OF STOCK.
      This
      Warrant shall be deemed to have been exercised immediately prior to the close
      of
      business on the date of its surrender for exercise as provided above, and the
      person entitled to receive the Warrant Shares issuable upon such exercise shall
      be treated for all purposes as the holder of record of such shares as of the
      close of business on such date. As soon as practicable on or after such date,
      the Company shall issue and deliver to the person or persons entitled to receive
      the same a certificate or certificates for the number of whole shares of Warrant
      Stock issuable upon such exercise.

     

    4. ADJUSTMENT
      PROVISIONS.
      The
      number and character of Warrant Shares issuable upon exercise of this Warrant
      (or any shares of stock or other securities or property at the time receivable
      or issuable upon exercise of this Warrant) and the Warrant Price therefor,
      are
      subject to adjustment upon the occurrence of the following events between the
      date this Warrant is issued and the date it is exercised:

     

    4.1 Adjustment
      for Stock Splits and Stock Dividends.
      The
      Warrant Price of this Warrant and the number of Warrant Shares issuable upon
      exercise of this Warrant (or any shares of stock or other securities at the
      time
      issuable upon exercise of this Warrant) shall each be proportionally adjusted
      to
      reflect any stock dividend, stock split or reverse stock split, or other similar
      event affecting the number of outstanding shares of the Common Stock.

     

    
      
        
        

      

      
        3

        
          

        

      

      
        
        

      

    

     

    4.2 Adjustment
      for Other Dividends and Distributions.
      In case
      the Company shall make or issue, or shall fix a record date for the
      determination of eligible holders entitled to receive, a dividend or other
      distribution payable respect to the Common Stock that is payable in
      (a) securities of the Company (other than issuances with respect to which
      adjustment is made under Sections 4.1 or 4.3) or (b) assets (other
      than cash dividends paid or payable solely out of retained earnings), then,
      and
      in each such case, the Holder, upon exercise of this Warrant at any time after
      the consummation, effective date or record date of such event, shall receive,
      in
      addition to the Warrant Shares issuable upon such exercise prior to such date,
      the securities or such other assets of the Company to which the Holder would
      have been entitled upon such date if the Holder had exercised this Warrant
      immediately prior thereto (all subject to further adjustment as provided in
      this
      Warrant).

     

    4.3 Adjustment
      for Reorganization, Consolidation, Merger.
      In case
      of any recapitalization or reorganization of the Company after the date of
      this
      Warrant, or in case, after such date, the Company shall consolidate with or
      merge into another corporation, then, and in each such case, the Holder, upon
      the exercise of this Warrant (as provided in Section 2), at any time after
      the consummation of such recapitalization, reorganization, consolidation or
      merger, shall be entitled to receive, in lieu of the stock or other securities
      and property receivable upon the exercise of this Warrant prior to such
      consummation, the stock or other securities or property to which the Holder
      would have been entitled upon the consummation of such recapitalization,
      reorganization, consolidation or merger if the Holder had exercised this Warrant
      immediately prior thereto, all subject to further adjustment as provided in
      this
      Warrant, and the successor or purchasing corporation in such reorganization,
      consolidation or merger (if other than the Company) shall duly execute and
      deliver to the Holder a supplement hereto acknowledging such corporation’s
      obligations under this Warrant; and in each such case, the terms of this Warrant
      shall be applicable to the shares of stock or other securities or property
      receivable upon the exercise of this Warrant after the consummation of such
      reorganization, consolidation or merger.

     

    4.4 Conversion
      of Stock.
      In case
      all the authorized shares of the Common Stock are converted, pursuant to the
      Company’s certificate of incorporation, into other securities or property, or
      the class of securities as to which purchase rights under this Warrant pertain
      otherwise ceases to exist, then, in such case, the Holder, upon exercise of
      this
      Warrant at any time after the date on which such class of securities is so
      converted or ceases to exist (the “Termination
      Date”),
      shall
      receive, in lieu of the number of shares of such class of securities that would
      have been issuable upon such exercise immediately prior to the Termination
      Date
      (the “Former
      Number of Shares”),
      the
      stock and other securities and property which the Holder would have been
      entitled to receive upon the Termination Date if the Holder had exercised this
      Warrant with respect to the Former Number of Shares immediately prior to the
      Termination Date (all subject to further adjustment as provided in this
      Warrant).

     

    4.5 Adjustments
      Due to Dilutive Issuances.
      

     

    (a) Adjustment
      of Warrant Shares for Dilutive Issuances.
      If,
      during the period beginning on the Execution Date and ending immediately
      following the consummation by the Company of an Additional Financing, the
      Company consummates a Dilutive Issuance, then this Warrant shall become
      exercisable for an additional number of Warrant Shares determined as
      follows:

     

    
      
        
        

      

      
        4

        
          

        

      

      
        
        

      

    

     

    (i) the
      number of Warrant Shares shall be increased by such number of shares of Common
      Stock as shall result in the number of Warrant Shares for which this Warrant
      shall be exercisable to equal (x) the sum of the number of Shares and Additional
      Investor Shares then issued and issuable to the Investor pursuant to the
      Purchase Agreement at the then-prevailing Adjusted Purchase Price, (y)
      multiplied by 0.50; and

     

    (ii) if
      the
      Dilutive Issuance shall consist of the issuance, in one or a series of related
      transactions, of both (x) shares of Common Stock (or securities convertible
      into
      or exchangeable for Common Stock) (collectively, “Dilutive
      Shares”)
      and
      (y) warrants, options to purchase or rights to subscribe for Common Stock (or
      securities convertible into or exchangeable for Common Stock) (collectively,
      “Dilutive
      Warrants”),
      then
      the number of Warrant Shares shall be further increased by such number of shares
      of Common Stock as shall result in the ratio of the sum of the Shares and
      Additional Investor Shares to Warrant Shares being equal to the ratio of
      Dilutive Shares to Dilutive Warrants issued or issuable in the Dilutive
      Issuance.

     

    (b) Adjustment
      of Warrant Price. In
      addition to the adjustments provided for elsewhere in this Warrant, if the
      Company shall consummate a Dilutive Issuance described in paragraph (a) above
      that includes Dilutive Warrants with an exercise price per share of Common
      Stock
      (determined in the manner described in Section 2.2 of the Purchase Agreement)
      less than the Warrant Price (as most recently adjusted prior to such Dilutive
      Issuance), then the Warrant Price shall be reduced, concurrently with such
      issuance, to such lower exercise price per share of Common Stock in such
      Dilutive Issuance. 

     

    4.6 Notice
      of Adjustments.
      The
      Company shall promptly give written notice of each adjustment or readjustment
      of
      the Warrant Price or the number or types of securities issuable upon exercise
      of
      this Warrant. The notice shall describe the adjustment or readjustment,
      including the kind and amount of stock or other securities or property for
      which
      this Warrant thereafter shall be exercisable, and show in reasonable detail
      the
      facts on which the adjustment or readjustment is based.

     

    4.7 No
      Change Necessary.
      The
      form of this Warrant need not be changed because of any adjustment in the
      Warrant Price or in the number of shares or class of securities issuable upon
      its exercise.

     

    4.8 Reservation
      of Stock.
      If and
      when necessary, the Company will take such corporate action as may, in the
      opinion of its counsel, be necessary to provide sufficient reserves of shares
      of
      Common Stock, issuable upon exercise of the Warrants. The Company agrees that
      its issuance of this Warrant shall constitute full authority to its officers
      who
      are charged with the duty of executing certificates to execute and issue the
      necessary certificates for Warrant Shares upon the exercise of this
      Warrant. If
      at any
      time the number of shares of Common Stock or other securities issuable upon
      exercise of this Warrant shall not be sufficient to effect the exercise of
      this
      Warrant, the Company of Common Stock or other securities issuable upon exercise
      of this Warrant as shall be sufficient for such purpose. All
      shares of Common Stock issued upon exercise of the Warrant shall be validly
      issued, fully paid and nonassessable.

     

    
      
        
        

      

      
        5

        
          

        

      

      
        
        

      

    

     

    5. REGISTRATION
      RIGHTS.
      The
      Warrant Shares shall be considered Registrable Securities for purposes of the
      Registration Rights Agreement dated as of November 29, 2006, by and among
      the Company, the Holder and the other persons named therein.

     

    6. NO
      RIGHTS OR LIABILITIES AS STOCKHOLDER.
      This
      Warrant does not by itself entitle the Holder to any voting rights or other
      rights as a stockholder of the Company. In the absence of affirmative action
      by
      the Holder to purchase Warrant Shares by exercise of this Warrant, no provisions
      of this Warrant, and no enumeration herein of the rights or privileges of the
      Holder, shall cause the Holder to be a stockholder of the Company for any
      purpose.

     

    7. NO
      IMPAIRMENT.
      The
      Company will not, by amendment of its certificate of incorporation or bylaws,
      or
      through reorganization, consolidation, merger, dissolution, issue or sale of
      securities, sale of assets or any other voluntary action, willfully 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 action as may be necessary or appropriate in
      order
      to protect the rights of the holder against wrongful impairment. Without
      limiting the generality of the foregoing, the Company will take all such action
      as may be necessary or appropriate in order that the Company may duly and
      validly issue, upon exercise of this Warrant, fully paid and nonassessable
      shares of such class of securities as to which purchase rights under this
      Warrant exist. 

     

    8. ATTORNEYS’
      FEES.
      In
      the
      event any party is required to engage the services of any attorneys for the
      purpose of enforcing this Warrant, the prevailing party shall be entitled to
      recover its reasonable expenses and costs in enforcing this Warrant, including
      attorneys’ fees.

     

    9. TRANSFER.
      This
      Warrant (and any interest or rights (legal or equitable) herein) may not be
      sold, assigned, disposed of, donated, pledged, conveyed, encumbered or otherwise
      transferred (a “Transfer”)
      by any
      means whatsoever, whether directly or indirectly, absolutely or conditionally,
      voluntarily or involuntarily, by operation of law or otherwise, without the
      prior written consent of the Company, and the Company may elect prior to any
      Transfer to require an opinion of counsel to the effect that registration is
      not
      required under the Securities Act in respect of such Transfer, and that such
      Transfer does not violate any applicable federal or state securities laws,
      provided that neither the Company’s written consent nor the delivery of a legal
      opinion shall be required for a Transfer by the Investor to (i)
      another Investor, (ii) if an Investor is an individual, the spouse or lineal
      descendants of such Investor, any trust for the benefit of such Investor or
      the
      benefit of the spouse or lineal descendants of such Investor, any corporation
      or
      partnership in which such Investor, the spouse and the lineal descendants of
      such Investor are the direct and beneficial owners of substantially all of
      the
      equity interests, and the personal representative of such Investor upon such
      Investor’s death for purposes of administration of such Holder’s estate or upon
      such Investor’s incompetency for purposes of the protection and management of
      the assets of such Investor, (iii) if an Investor is an investment fund, to
      an
      investment fund under common management with such Investor, (iv) if such
      Investor is a partnership or limited liability company, any partners or members
      of such partnership or limited liability company, (v) if such Investor is a
      corporation, any stockholders of such corporation, and (vi) if an Investor
      is a
      trust, any beneficiaries of such trust.
      Upon the
      permitted transfer and the surrender of this Warrant, the Company will issue
      a
      new Warrant in the name of the transferee at no charge, except for any
      applicable transfer taxes. The rights and obligations of the Company and the
      Holder under this Warrant and the Purchase Agreement shall be binding upon
      and
      benefit their respective permitted successors, assigns, heirs, administrators
      and transferees.

     

    
      
        
        

      

      
        6

        
          

        

      

      
        
        

      

    

     

    10. GOVERNING
      LAW.
      The
      internal laws of the State of New York (irrespective of its choice of law
      principles) will govern the validity of this Warrant, the construction of its
      terms, and the interpretation and enforcement of the rights and duties of the
      parties hereto.

     

    11. HEADINGS.
      The
      headings and captions used in this Warrant are used only for convenience and
      are
      not to be considered in construing or interpreting this Warrant. All references
      in this Warrant to sections and exhibits shall, unless otherwise provided,
      refer
      to sections hereof and exhibits attached hereto, all of which exhibits are
      incorporated herein by this reference.

     

    12. NOTICES.
      Any
      notice required or permitted under this Warrant shall be effected in accordance
      with the provisions of Section 8.5 of the Purchase Agreement.

     

    13. AMENDMENT;
      WAIVER.
      This
      Warrant and any provision hereof may be amended, waived or terminated only
      in
      accordance with Section 8.8 of the Purchase Agreement.

     

    14. SEVERABILITY.
      If any
      provision of this Warrant, or the application thereof, will for any reason
      and
      to any extent be invalid or unenforceable, the remainder of this Warrant and
      application of such provision to other persons or circumstances will be
      interpreted so as reasonably to effect the intent of the parties hereto. The
      parties further agree to replace such void or unenforceable provision of this
      Agreement with a valid and enforceable provision that will achieve, to the
      extent possible, the economic, business and other purposes of the void or
      unenforceable provision.

     

    15. TERMS
      BINDING.
      By
      acceptance of this Warrant, the Holder accepts and agrees to be bound by all
      the
      terms and conditions of this Warrant.

     

    
      
        
        

      

      
        7

        
          

        

      

      
        
        

      

    

    IN
      WITNESS WHEREOF, the
      parties hereto have executed this Warrant as of the date first above
      written.

     

    
      	
              THE
                COMPANY:

               

              NEURO-HITECH,
                INC.

            
	
              By:

            	 
	 	
              

            
	
              Name:

            	
              David
                Barrett

            
	
              Title:

            	
              Chief
                Financial Officer

            

    

     

    
      	
              AGREED
                AND ACKNOWLEDGED BY THE HOLDER:

            
	
               

              HOLDER:

               

              [                                                                               
                 ]

            
	
              By:

            	 
	 	 
	
              Address:

            	 
	
              of
                Holder

            	 

    

     

     

    
      
        
        

      

      
        8

        
          

        

      

      
        
        

      

    

    EXHIBIT 1

     

    FORM
      OF SUBSCRIPTION

     

    (To
      be signed only upon exercise of Warrant)

     

    To:
      Neuro-Hitech, Inc.

     

    (1) The
      undersigned Holder hereby elects to purchase     
        
      Warrant
      Shares of Neuro-Hitech, Inc. (the “Warrant
      Stock”),
      pursuant to the terms of the attached Warrant, and:

     

    _______
      tenders herewith payment of the purchase price for such shares in full;
      or

     

    _______
      elects cashless exercise pursuant to Section 2.1(b) of the attached
      Warrant.

     

    (Please
      check one)

     

    (2) In
      exercising the Warrant, the undersigned Holder hereby confirms and acknowledges
      that the representations made by the Holder in Section 4.1 of the Purchase
      Agreement (as defined in the Warrant) continue to be true and correct as of
      this
      date. 

     

    (3) Please
      issue a certificate or certificates representing such Warrant Shares in the
      name
      specified below:

     

    
      	 
	
              (Name)

            
	 
	 
	
              (Address)

            
	 
	 
	
              (City,
                State, Zip Code)

            
	 
	 
	
              (Federal
                Tax Identification Number)

            
	 
	 
	
              (Date)

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00114-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00114-of-00352.parquet"}]]