1H-Purine-2,6-dione, 3,9-dihydro-1-methyl-
Xanthine, 1-methyl-
1H-Purine-2,6-dione, 3,7-dihydro-1-methyl-
3,9-Dihydro-1-methyl-1H-purine-2,6-dione
1-Methylxanthine
1-Methyl-3,7-dihydro-purine-2,6-dione
1-Methyl-2,3,6,9-tetrahydro-1H-purine-2,6-dione
2-Hydroxy-1-methyl-6,9-dihydro-1H-purin-6-one