Item 8.01. Other Events.

On October 28, 2008, Avalon Pharmaceuticals, Inc., a Delaware corporation ("Avalon"), issued a joint press release with Clinical Data, Inc., a Delaware corporation ("Clinical Data"), announcing that Avalon, Clinical Data and API Acquisition Sub II, LLC, a Delaware corporation and an indirect wholly-owned subsidiary of Clinical Data, had entered into a definitive Agreement and Plan of Merger and Reorganization for the acquisition of Avalon by Clinical Data. The press release is attached as Exhibit 99.1 hereto and is incorporated herein by reference.
Section 9 - Financial Statements and Exhibits Item 9.01. Financial Statements and Exhibits.

(d) Exhibits

99.1 Joint press release issued by Avalon Pharmaceuticals, Inc. and Clinical Data, Inc. dated October 28, 2008.

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