Synonyms: Theophylline Imp. D (EP), Theophyllidine, Theophylline-Ethylenediamine Imp. D (EP), 1H-Imidazole-4-carboxamide, N-methyl-5-(methylamino)-, Imidazole-4(or 5)-carboxamide, N-methyl-5(or 4)-methylamino- (6CI), Imidazole-4-carboxamide, N-methyl-5-(methylamino)- (8CI), 4-(Methylamino)-5-(N-methylcarbamoyl)imidazole, Theophyllidine (imidazole derivative),N-Methyl-5-(methylamino)-1H-imidazole-4-carboxamide, Diprophylline Imp. A (EP), Theophyllidine