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-(3-methoxy-2-pyridylmethylthio)ethyl)guanidino]propane and 1-[N-(2-(3-methoxy-pyridylmethylthio)ethyl)guanidino]-3-(N'-2-(5-methyl-4- imidazolylmethylthio)ethyl)guanidino]propane. The compounds of this invention are inhibitors of H-2 histamine receptors.
                            该化合物是C.sub.2-C.sub.8直链烷基,通过N-(N'-取代
鸟氨酸基),N-(N',N"-二取代
鸟氨酸基),N-(N'-取代
硫脲基),N-(亚硝基
亚胺基)或S-(N-取代异
硫脲基)基团末端取代对称或不对称。该发明的两种化合物是1,3-双-[N'-(2-(3-甲氧基-2-
吡啶甲
硫基)乙基)
鸟氨酸基]
丙烷和1-[N-(2-(3-甲氧基-
吡啶甲
硫基)乙基)
鸟氨酸基]-3-(N'-2-(5-甲基-4-
咪唑甲基
硫基)乙基)
鸟氨酸基]
丙烷。该发明的化合物是H-2
组胺受体的
抑制剂。