1-Methylxanthine 1H-Purine-2,6-dione, 3,7-dihydro-1-methyl- 3,7-Dihydro-1-methyl-1H-purine-2,6-dione 6136-37-4 CCRIS 5816 EINECS 228-108-5 Xanthine, 1-methyl-