4-(2-(5-Cyano-6-methyl-2,4-dioxo-3,4-dihydro-1(2H)-pyrimidinyl)ethyl)-N-(6-(((4-(2-(5-cyano-6-methyl-2,4-dioxo-3,4-dihydro-1(2H)-pyrimidinyl)ethyl)-1-piperazinyl)carbonyl)amino)hexyl)-1-piperazinecarb\toxamide AIDS-132138 AIDS132138 NSC625514