3-(5-Fluoro-2,4-dioxo-3,4-dihydro-1(2H)-pyrimidinyl)-N-(2-((3-(5-fluoro-2,4-dioxo-3,4-dihydro-1(2H)-pyrimidinyl)propanoyl)(methyl)amino)ethyl)-N-methylpropanamide AIDS-141378 AIDS141378 NSC656741