2,5-Dibenzyl-3-methyl-1,4-dioxo-2,3,4,5-tetrahydro-1H- {pyrrolo[3,} 4-c\]pyridine 2,5-Dibenzyl-6-hydroxy-3-methyl-3,5-dihydro-1H-pyrrolo[3,4-c]pyridine-1,4(2H)-dione AIDS-139758 AIDS139758 NSC649764