Sec Form 4 Filing - BIOMARIN PHARMACEUTICAL INC @ CATALYST PHARMACEUTICAL PARTNERS, INC. - 2012-12-08

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 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

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1. Name and Address of Reporting Person BIOMARIN PHARMACEUTICAL INC 2. Issuer Name and Ticker or Trading Symbol CATALYST PHARMACEUTICAL PARTNERS, INC. [ CPRX] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 105 DIGITAL DRIVE 3. Date of Earliest Transaction (MM/DD/YY) 12/08/2012 (Street) NOVATO, CA94949 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 12/08/2012 P 5,000,000 A $ 0.75 ( 1 ) 6,666,667 D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Convertible Promissory Note and Note Purchase Agreement $ 0.75 ( 1 ) 12/08/2012 J 5,000,000 12/08/2012( 1 ) 12/08/2012( 1 ) Common Stock 6,666,667 ( 1 ) 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other BIOMARIN PHARMACEUTICAL INC 105 DIGITAL DRIVE NOVATO, CA94949 X Signatures /s/ G. Eric Davis 12/11/2012 Signature of Reporting Person Date

Explanation of Responses:

( 1 )BioMarin Pharmaceuticals, Inc. held a Convertible Promissory Note and Purchase Agreement ("Convertible Note") in the aggregate amount of $5,000,000 that automatically converted into 6,666,666 shares of Common Stock of Catalyst Pharmaceuticals, Inc. at a conversion price of $0.75 per share on December 8, 2012. The number of shares issuable upon conversion of the Convertible Note was determined by dividing the aggregate principal amount of the note, $5,000,000 by the "Conversion Price" in effect on December 8, 2012. The Conversion Price was the dollar weighted average price of the Common Stock for the 15 business day period prior to December 8, 2012, multiplied by 0.9; provided, however, that the Conversion price could not be less than $0.75 per share or more than $2.50 per share.

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).

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