1. Chemistry Process Research and Development, Amgen Inc., Thousand Oaks, California 19320, Medicinal Chemistry, Amgen SF, South San Francisco, California 94080, Process Chemistry, Incycte Corporation, Wilmington, Delaware 19880, and Pharmaceutical Products PPG-Sipsy, Z.I. La Croix Cadeau B.P. 79, F-49242 Avrillé Cedex, France