| 摘要 |
This invention provides Class III anti-arrhythmic agents of the formula: <IMAGE> in which R1 is alkylsulfonamido, arylsulfonamido, perfluoroalkylsulfonamido, R2 and R3 are hydrogen or alkyl, R4 is alkyl, and n is 2 to 4, or a pharmaceutically acceptable salt thereof. |
