1. Molecular Targets Discovery Program, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, Maryland 21702-1201, Basic Research Program, SAIC Frederick, Frederick, Maryland 21702-1201, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892-0810, Department of Chemistry, University of Hawaii at Manoa, Manoa, Hawaii 96822, AIDS Vaccine Program, SAIC Frederick, Frederick, Maryland...