N-Methyl-5-(MethylaMino)-1H-iMidazole-4-carboxaMide Hydrochloride;N-Methyl-5(or 4)-MethylaMino-;Theophyllidine Hydrochloride;N-methyl-4-(methylamino)-1H-imidazole-5-carboxamide:hydrochloride;Theophylline EP Impurity D HCl;Theophylline-ethylenediamine EP Impurity D;Theophylline-ethylenediamine Impurity 4(Theophylline-ethylenediamine EP Impurity D);Theophyllidine HCl