Synonyms: 1H-Imidazole-5-carboxamide, N,1-dimethyl-4-(methylamino)-, hydrochloride (1:1), 1H-Imidazole-5-carboxamide, N,1-dimethyl-4-(methylamino)-, monohydrochloride (9CI), 3-Methyl-5-methylamino-3H-imidazole-4-carboxylic acid methylamide, hydrochloride, Caffeine EP Impurity E HCl (Caffeidine HCl)