2-Cyano-1-methyl-3-(2-(((5-methylimidazol-4-yl)methyl)thio)ethyl)guanidine monohydrochloride 70059-30-2 Cimetex Cimetidine hydrochloride Cimetidine hydrochloride [USAN] EINECS 274-297-2 Guanidine, N''-cyano-N-methyl-N'-(2-(((5-methyl-1H-imidazol-4-yl)methyl)thio)ethyl)-, monohydrochloride N-Cyano-N'-methyl-N''-(2-(((5-methyl-1H-imidazol-4-yl)methyl)thio)ethyl)guanidine monohydrochloride Tagamet Injection Tagamet Liquid