1. Intramural Research Support Program, SAIC Frederick, National Cancer Institute at Frederick, Frederick, Maryland 21702, Chemistry Section, Laboratory of Comparative Carcinogenesis, National Cancer Institute at Frederick, Frederick, Maryland 21702, Laboratory for the Structure of Matter, Naval Research Laboratory, Washington, District of Columbia 20375, Infectious Disease Research, Southern Research Institute, Frederick, Maryland 21702, and Department of Chemistry, George Mason University, Fairfax,...