CALLISTO PHARMACEUTICALS INC Uncategorized Contracts & Agreements

EXTENSION AGREEMENT (Filed With SEC on March 23, 2010)

CALLISTO PHARMACEUTICALS, INC. 420 Lexington Avenue, Suite 1609 New York, New York 10170 REQUEST FOR EXTENSION (Filed With SEC on March 23, 2010)

AMENDED AND RESTATED CONSULTINGAGREEMENT (Filed With SEC on April 15, 2009)

AMENDED AND RESTATED EXECUTIVE EMPLOYMENTAGREEMENT (Filed With SEC on April 15, 2009)

WHEREAS: (Filed With SEC on April 15, 2009)

AMENDED AND RESTATED EXECUTIVE EMPLOYMENTAGREEMENT (Filed With SEC on March 28, 2008)

CERTIFICATE OF AMENDMENT TO THE CERTIFICATE OF INCORPORATION OF CALLISTO PHARMACEUTICALS, INC. (Filed With SEC on October 1, 2007)

PUT OPTION AGREEMENT (Filed With SEC on August 7, 2007)

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EXTENSIONAND AMENDMENT AGREEMENT (Filed With SEC on April 17, 2007)

EXTENSION AND AMENDMENT AGREEMENT (Filed With SEC on April 17, 2007)

SECURITIESPURCHASE AGREEMENT (Filed With SEC on January 17, 2007)

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SECURITIESPURCHASE AGREEMENT (Filed With SEC on October 27, 2006)

LOCK UP AGREEMENT (Filed With SEC on September 14, 2006)

CALLISTOPHARMACEUTICALS, INC. (Filed With SEC on September 14, 2006)

Callisto Pharmaceuticals, Inc. 420 Lexington Avenue, Suite 1609 New York, NY 10170 LETTER AGREEMENT (Filed With SEC on September 14, 2006)

Letter of Engagement Callisto Pharmaceuticals, Inc. July 18, 2005 (Filed With SEC on July 22, 2005)

1,793,322 Warrants July 18, 2005 CALLISTO PHARMACEUTICALS, INC. WARRANTS (Filed With SEC on July 22, 2005)