1. Molecular Recognition Section,
Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892-0810, United States
2. Department of Pharmacological
and Physiological Science, Saint Louis University School of Medicine, St. Louis, Missouri 63104, United States
3. Department of Pharmacology, Medical College of Wisconsin, 8701 Watertown Plank
Road, Milwaukee, Wisconsin 53226, United States