135446-12-7 2,5,6,9-Tetrahydro-9-methyl-6-benzyl-3H-1,2,4-triazolo(3,4-i)purine-3,5-dione 3H-1,2,4-Triazolo(3,4-i)purine-3,5(2H)-dione, 6,9-dihydro-9-methyl-6-(phenylmethyl)- 6,9-Dihydro-9-methyl-6-(phenylmethyl)-3H-1,2,4-triazolo(3,4-i)purine-3,5(2H)-dione