Methanesulfonamides are structurally depicted by Formula I' ##STR1## or its pharmacologically acceptable salts where R.sub.3 is a C.sub.1-7 alkyl substituted with C.sub.3-7 cycloalkyl, or a C.sub.1-10 alkyl substituted with one to eight fluorine atoms, one to three hydroxy, one to three C.sub.1-5 acyloxy or one to three C.sub.1-4 alkoxy substituents. These compounds are useful as Class III antiarrhythmic agents and are stable against rapid metabolism. Methods for treating cardiac arrhythmias with the compounds of Formula I' as well as compositions thereof are also described.
甲磺
酰胺类化合物结构如式I所示:##STR1##或其药理学上可接受的盐,其中R3为被C3-7环烷基取代的C1-7烷基,或被一至八个
氟原子、一至三个羟基、一至三个C1-5酰氧基或一至三个C1-4烷氧基取代的C1-10烷基。这些化合物作为III类
抗心律失常药物具有用途,并且对快速代谢稳定。还描述了使用式I化合物及其组合物治疗心律失常的方法。