The compounds are heterocyclomethylsulphinylethyl derivatives of N-cyanoguanidines, thioureas and 2-amino-1-nitroethylene which are histamine H.sub.2 -antagonists or are converted into histamine H.sub.2 -antagonists in the animal body. Two specific compounds of the present invention are 1-nitro-2-[2-((2-thiazolyl)methylsulphinyl)ethylamino]-2-[2-((2-thiazolyl) methylthio)ethylamino]ethylene and 1-nitro-2,2-bis-[2-((2-thiazolyl)methylsulphinyl)ethylamino]ethylene.
                            这些化合物是N-
氰基
脲、
硫脲和2-
氨基-1-
硝基乙烯的杂环甲基亚磺酰乙基衍
生物,它们是
组胺H.sub.2-拮抗剂,或在动物体内转化为
组胺H.sub.2-拮抗剂。本发明的两种特定化合物是1-硝基-2-[2-((2-
噻唑基)甲基亚磺酰基)乙基
氨基]-2-[2-((2-
噻唑基)甲
硫基)乙基
氨基]
乙烯和1-硝基-2,2-双-[2-((2-
噻唑基)甲基亚磺酰基)乙基
氨基]
乙烯。