1. Chemical Sciences, Wyeth Research, CN 8000, Princeton, New Jersey 08543, Chemical Sciences, Wyeth Research, 401 N. Middletown Road, Pearl River, New York 10965, Chemical Sciences, Drug Safety and Metabolism, and Cardiovascular and Metabolic Diseases, Wyeth Research, 500 Arcola Road, Collegeville, Pennsylvania 19426, and Zealand Pharma A/S, Smedeland 36 DK-2600 Glostrup, Denmark