The compounds are N-(heterocyclomethylthioalkyl)derivatives of alkylguanidines, C-alkyl and C-aryl amidines and S-alkylisothioureas. The compounds may also have N'-lower alkyl or N'-(heterocyclomethylthioalkyl)substituents. Three compounds of the invention are S-methyl-N-[2-(5-methyl-4-imidazolylmethylthio)ethyl]isothiourea, N,N'-bis-[2-(5-methyl-4-imidazolylmethylthio)ethyl]acetamidine, N,N'-bis-[2-(5-methyl-4-imidazolylmethylthio)ethyl]N"-methylguanidine. The compounds of this invention are histamine H.sub.2 -antagonists.
这些化合物是烷基
胍基的N-(杂环甲基
硫代烷基)衍
生物、C-烷基和C-芳基酰胺和S-烷基异
硫脲。这些化合物也可能具有N'-低烷基或N'-(杂环甲基
硫代烷基)取代基。该发明的三种化合物是S-甲基-N-[2-(5-甲基-4-
咪唑甲基
硫基)乙基]异
硫脲、N,N'-双-[2-(5-甲基-4-
咪唑甲基
硫基)乙基]乙酰胺和N,N'-双-[2-(5-甲基-4-
咪唑甲基
硫基)乙基]N''-甲基
胍。该发明的化合物是
组胺H.sub.2 -拮抗剂。