1,3,8-Trimethyl-2,6-dioxopurine 1H-Purine-2,6-dione, 3,7-dihydro-1,3,8-trimethyl- (9CI) 3,7-Dihydro-1,3,8-trimethyl-1H-purine-2,6-dione 8-Methyltheophylline 830-65-9 NSC 14289 Theophylline, 8-methyl- Xanthine, 1,3,8-trimethyl- Xanthine, 1,3,8-trimethyl- (8CI)