The compounds are C.sub.2 -C.sub.8 straight chain alkanes terminally substituted, symmetrically or unsymmetrically, by N-(N'-substituted guanidino), N-(N',N" -disubstituted guanidino), N-(N'-substituted thioureido), N-(nitromethylene amidino) or S-(N-substituted isothioureido) groups. Two compounds of the invention are 1,3-bis-[N'-(2-(5-methyl-4-imidazolylmethylthio)ethyl)guanidino]propane and 1,3-bis-[S-(N-2-(5-methyl-4-imidazolylmethylthio)ethyl)isothioureido]p ropane. The compounds of this invention are inhibitors of H-2 histamine receptors.
该化合物为C.sub.2 -C.sub.8 直链烷基,在末端取代,对称或不对称地,由N-(N'-取代的
胍基)、N-(N',N" -二取代的
胍基)、N-(N'-取代的
硫脲基)、N-(亚硝基
亚胺基)或S-(N-取代的异
硫脲基)基团。本发明的两种化合物为1,3-双-[N'-(2-(5-甲基-4-
咪唑甲基
硫醇)乙基)
胍基]
丙烷和1,3-双-[S-(N-2-(5-甲基-4-
咪唑甲基
硫醇)乙基)异
硫脲基]
丙烷。本发明的化合物是H-2
组胺受体的
抑制剂。