(1,2,4)Triazino(3,4-f)purine-6,8(7H,9H)-dione, 1,4-dihydro-3,4,9-trimethyl- 1,4-Dihydro-3,4,9-trimethyl-(1,2,4)triazino(3,4-f)purine-6,8(7H,9H)-dione 106087-30-3