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.
甲烷磺
酰胺类化合物的结构式为I',其中R.sub.3是C.sub.1-7烷基,其上取代有C.sub.3-7环烷基,或C.sub.1-10烷基,其上取代有1-8个
氟原子,1-3个羟基,1-3个C.sub.1-5酰氧基或1-3个C.sub.1-4烷氧基。这些化合物可作为III类
抗心律失常药物,且稳定性高,不易被快速代谢。本文还描述了使用I'式化合物及其组合物治疗心律失常的方法。