1. Molecular Recognition Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892, Computational Chemistry Core Laboratory, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892, Laboratoire de Chimie Organique Biomoléculaire de Synthese, UMR 5625 CNRS-UM II, Université Montpellier II, Place E. Bataillon, 34095 Montpellier, Cedex 5,...