1H-Pyrrolo(3,4-d)pyrimidine-2,4(3H,6H)-dione, 3,7-diphenyl-5-methyl- 3,7-Diphenyl-5-methyl-1H-pyrrolo(3,4-d)pyrimidine-2,4(3H,6H)-dione 57436-21-2 BRN 0622850