1H-Pyrrolo(3,2-d)pyrimidine-2,4(3H,5H)-dione, 3-butyl-1-methyl- 3-Butyl-1-methyl-1H-pyrrolo(3,2-d)pyrimidine-2,4(3H,5H)-dione 3-Butyl-1-methyl-2,4-dioxo-1,2,3,4-tetrahydropyrrolo(3,2-d)pyrimidine 55276-32-9 BRN 0654838