Synonyms: Theophylline Imp. B (EP), 3-Methyl-3,7-dihydro-1H-purine-2,6-dione, 3-Methylxanthine,Theophylline-Ethylenediamine Imp. B (EP), Pentoxifylline Imp. B (EP), 1H-Purine-2,6-dione, 3,7-dihydro-3-methyl- (9CI), Xanthine, 3-methyl- (6CI,7CI,8CI), 3,9-Dihydro-3-methyl-1H-purine-2,6-dione, 3-Methyl-1H-purine-2,6(3H,7H)-dione, 3-Methyl-2,3,6,7-tetrahydro-1H-purine-2,6-dione, 3-Methyl-2,3,6,9-tetrahydro-1H-purine-2,6-dione, 3-Methyl-3,7-dihydropurine-2,6-dione, 3-Methyl-3,9-dihydro-purine-2,6-dione, 3-Methyl-7H-purine-2,6-dione, NSC 515466, 1H-Purine-2,6-dione, 3,9-dihydro-3-methyl-