1. Wyeth Research, Chemical Sciences, 500 Arcola Road, Collegeville, Pennsylvania 19426, Wyeth Research, Chemical Sciences, 200 Cambridge Park Drive, Cambridge, Massachusetts 02140, Wyeth Research, Chemical Sciences, 865 Ridge Road, Princeton, New Jersey 08543, and Wyeth Research, Chemical Sciences, 401 N. Middletown Road, Pearl River, New York 10965