Compounds having the formula I
wherein R1 is alkylsulphonamido, arylsulphonamide or perfluoroalkylsulphonamido, R2 and R3 are hydrogen or alkyl, R4 is alkyl and n is 2 to 4 and the pharmaceutically acceptable salts thereof are useful as Class III arrhythmic agents.
具有式 I 的化合物,其中 R1 是烷基磺酰胺、芳基磺酰胺或
全氟烷基磺酰胺,R2 和 R3 是氢或烷基,R4 是烷基,n 是 2 至 4,及其药学上可接受的盐类可用作 III 类心律失常药物。