1. Chemical and Screening Sciences, Wyeth Research, 401 N. Middletown Road, Pearl River, New York 10965, Chemical and Screening Sciences, Wyeth Research, 200 Cambridge Park Drive, Cambridge, Masssachusetts 02139, Chemical and Screening Sciences, Wyeth Research, Princeton, New Jersey 08852, Discovery Neuroscience, Wyeth Research, Princeton, New Jersey 08852, and Chemical and Screening Sciences, Wyeth Research, 500 Arcola Road, Collegeville, Pennsylvania 19426