1,3,8-Trimethyl-2,6-dioxopurine 1H-Purine-2,6-dione, 3,7-dihydro-1,3,8-trimethyl- 8-Methyltheophylline 830-65-9 NSC14289 Theophylline, 8-methyl- WLN: T56 BM DN FNVNVJ C1 F1 H1 Xanthine, 1,3,8-trimethyl-