Ownership Submission
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 OF SECURITIES

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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(Print or Type Responses)
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 (Month/Day/Year)
12/08/2012
(Street)

NOVATO, CA 94949		 4. If Amendment, Date Original Filed(Month/Day/Year)
 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 (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 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  

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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 (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 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
(Month/Day/Year)		 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, CA 94949		     X    

Signatures

 /s/ G. Eric Davis   12/11/2012
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(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.

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