Pfizer Inc. (NYSE:PFE) and Anacor Pharmaceuticals, Inc. (NASDAQ:ANAC) today announced that they have entered into a definitive merger agreement under which Pfizer will acquire Anacor for $99.25 per Anacor share, in cash, for a total transaction value, net of cash, of approximately $5.2 billion, which assumes the conversion of Anacor’s outstanding convertible notes. The Boards of Directors of both companies have unanimously approved the transaction. Anacor’s flagship asset, crisaborole, a differentiated non-steroidal topical PDE4 inhibitor with anti-inflammatory properties, is currently under review by the U.S. FDA for the treatment of mild-to-moderate atopic dermatitis, commonly referred to as eczema.