1. Chemical Sciences, Wyeth Research, CN 8000, Princeton, New Jersey 08543
2. Discovery Neurosciences, Wyeth Research, CN 8000, Princeton, New Jersey 08543
3. Drug Safety & Metabolism, Wyeth Research, 500 Arcola Road, Collegeville, Pennsylvania 19426
4. Department of Pharmacy and Pharmacology, University of Bath, Claverton Down, Bath BA2 7AY, U.K.