UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                              Washington, DC 20549

                                     FORM 4

                  STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

    Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934,
       Section 17(a) of the Public Utility Holding Company Act of 1935 or
               Section 30(h) of the Investment Company Act of 1940

|X|  Check this box if no longer subject to Section 16. Form 4 or Form 5
     obligations may continue. See Instruction 1(b).

(Print or Type Responses)
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1.   Name and Address of Reporting Person*

     Lindsay A. Rosenwald, M.D.
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     (Last)                           (First)             (Middle)

     787 Seventh Avenue, 48th Floor
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                                    (Street)

     New York                          NY                10019
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     (City)                           (State)              (Zip)

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2.   Issuer Name and Ticker or Trading Symbol

     Manhattan Pharmaceuticals, Inc.
     (f/k/a Atlantic Technology Ventures) ATLC.OB
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3.   I.R.S. Identification Number of Reporting Person, if an entity (voluntary)


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4.   Statement for Month/Day/Year

     February 2002
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5.   If Amendment, Date of Original (Month/Day/Year)


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6.   Relationship of Reporting Person(s) to Issuer
     (Check all applicable)

     |_|  Director                             |X|  10% Owner
     |_|  Officer (give title below)           |_|  Other (specify below)

     ____________________________________________________________________
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7.   Individual or Joint/Group Filing (Check Applicable line)

     |X|  Form Filed by One Reporting Person
     |_|  Form Filed by More than One Reporting Person
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           Table I -- Non-Derivative Securities Acquired, Disposed of,
                             or Beneficially Owned
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                                                                                                 5.
                                                                                                 Amount of      6.
                                                                 4.                              Securities     Owner-
                                                                 Securities Acquired (A) or      Beneficially   ship
                                       2A.          3.           Disposed of (D)                 Owned          Form:     7.
                            2.         Deemed       Transaction  (Instr. 3, 4 and 5)             Following      Direct    Nature of
                            Trans-     Execution    Code         ------------------------------- Reported       (D) or    Indirect
1.                          action     Date, if     (Instr. 8)                   (A)             Transaction(s) Indirect  Beneficial
Title of Security           Date       any          ------------                 or              (Instr. 3 &    (I)       Ownership
(Instr. 3)                  (mm/dd/yy) (mm/dd/yy)    Code      V     Amount      (D)    Price     Instr.4)      (Instr.4) (Instr.4)
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Common Stock                02/21/03                 J(1)            7,136,453    A     --       10,629,501      D
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Reminder: Report on a separate line for each class of securities beneficially
owned directly or indirectly.

*     If the form is filed by more than one reporting person, see Instruction
      4(b)(v).

      Persons who respond to the collection of information contained in this
      form are not required to respond unless the form displays a currently
      valid OMB control number


FORM 4 (continued)

Table II -- Derivative Securities Acquired, Disposed of, or Beneficially Owned
            (e.g., puts, calls, warrants, options, convertible securities)

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                                                                                                          9.
                                                                                                          Number    10.
                                                                                                          of        Owner-
                                                                                                          deriv-    ship
                                                                                                          ative     Form
             2.                                                                                           Secur-    of
             Conver-                            5.                              7.                        ities     Deriv-   11.
             sion                               Number of                       Title and Amount          Bene-     ative    Nature
             or                                 Derivative    6.                of Underlying     8.      ficially  Secur-   of
             Exer-            3A.      4.       Securities    Date              Securities        Price   Owned     ity:     In-
             cise             Deemed   Trans-   Acquired (A)  Exercisable and   (Instr. 3 and 4)  of      Follow-   Direct   direct
             Price   3.       Execut-  action   or Disposed   Expiration Date   ----------------  Deriv-  ing       (D) or   Bene-
1.           of      Trans-   ion      Code     of(D)         (Month/Day/Year)            Amount  ative   Reported  In-      ficial
Title of     Deriv-  action   Date if  (Instr.  (Instr. 3,    ----------------            or      Secur-  Trans-    direct   Owner-
Derivative   ative   Date     any      8)       4 and 5)      Date     Expira-            Number  ity     action(s) (I)      ship
Security     Secur-  (mm/dd/  (mm/dd/  ------   ------------  Exer-    tion               of      (Instr. (Instr.   (Instr.  (Instr.
(Instr. 3)   ity     yy)      yy)      Code V    (A)   (D)    cisable  Date     Title     Shares  5)      4)        4)       4)
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Explanation of Responses:

(1)   On February 21, 2003, Atlantic Technology Ventures, Inc. completed a
      merger with a private company, Manhattan Pharmaceuticals, Inc. pursuant to
      which, Atlantic issued 12.70967 shares of Common Stock for each one (1)
      share of Manhattan Common Stock. In connection with the Merger, Dr.
      Rosenwald, who is a stockholder of both Manhattan and Atlantic, received
      7,136,953 shares of Common Stock.

(2)   In connection with the Merger, holders of certain Common Stock Warrants of
      Atlantic exchanged such warrants for shares of Common Stock on the basis
      of one share of Common Stock for every three shares of Common Stock
      underlying the Warrants. As a result, Dr. Rosenwald was issued 694,444
      shares of Common Stock.

**    Intentional misstatements or omissions of facts constitute Federal
      Criminal Violations.

      See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).


/s/ Lindsay A. Rosenwald, M.D.                               February 26, 2002
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      **Signature of Reporting Person                             Date
      Lindsay A. Rosenwald, M.D.

Note: File three copies of this Form, one of which must be manually signed.
      If space is insufficient, see Instruction 6 for procedure.