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Prinaberel

Pfizer Inc.

Drug Names(s): ERB-041

Description: ERB-041 is a potent and highly selective estrogen receptor (ER) beta agonist that has comparable binding affinity for ERbeta as the natural ligand (17beta-estradiol), but is >200-fold selective over ERalpha.

Deal Structure: ERB-041 was originally developed by Wyeth.

In January 2009, Pfizer and Wyeth announced that they entered into a definitive merger agreement under which Pfizer will acquire Wyeth in a cash-and-stock transaction currently valued at $50.19 per share, or a total of approximately $68 billion. In October 2009, Pfizer completed its acquisition of Wyeth.


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