1. Laboratory of Medicinal Chemistry, Center for Cancer Research, NCI-Frederick, NIH, Frederick, Maryland 21702, HIV Drug Resistance Program, Center for Cancer Research, NCI-Frederick, NIH, Frederick, Maryland 21702, Experimental Retrovirology Section, Center for Cancer Research, NCI, NIH, Bethesda, Maryland 20892, NMR Group, Laboratory of Proteomics and Analytical Technologies, SAIC Frederick, Frederick, Maryland 21702, Laboratory for the Structure of Matter, Naval Research Laboratory, Washington, D.C....