4,7-Diphenyl-6-ethyl-5-methyl-6H-pyrrolo(3,4-d)pyrimidin-2(1H)-one 57436-13-2 6H-Pyrrolo(3,4-d)pyrimidin-2(1H)-one, 4,7-diphenyl-6-ethyl-5-methyl- BRN 0625530