1-Methyl-8-azaxanthin 1H-v-Triazolo(4,5-d)pyrimidine-5,7(4H,6H)-dione, 6-methyl- 2083-05-8 6-Methyl-1H-v-triazolo(4,5-d)pyrimidine-5,7(4H,6H)-dione BRN 0523187