The present invention relates to compounds of the formula ##STR1## or a pharmaceutically acceptable salt thereof; wherein n is 0, 1 or 2; wherein R is H or lower alkyl of 1 to 6 carbon atoms; wherein X is selected from the group consisting of hydrogen, methane sulfonamide, nitro, cyano, imidazolyl, alkoxy of 1 to 6 carbon atoms and hydroxy; and wherein Ar is selected from the group consisting of pyridinyl, tetrahydronaphthalenyl, benzofuranyl, and Ph--CH.dbd.CH-- and phenyl all optionally substituted by methane sulfonamide, nitro, cyano, or imidazolyl with the proviso that when n is 1, Ar is other then phenyl; pharmaceutical compositions containing these compounds and a method for treating cardiac arrhythmias in mammals by administering the compositions.
本发明涉及以下式的化合物或其药学上可接受的盐:##STR1## 其中n为0、1或2;其中R为H或1至6个碳原子的低烷基;其中X选自氢、
甲烷磺酰胺、硝基、
氰基、
咪唑基、1至6个碳原子的烷氧基和羟基的群;其中Ar选自
吡啶基、四氢
萘基、
苯并呋喃基和Ph-CH.dbd.CH-和苯基,所有这些基均可选择性地被
甲烷磺酰胺、硝基、
氰基或
咪唑基取代,但当n为1时,Ar不为苯基;含有这些化合物的制药组合物以及通过给哺乳动物投予这些组合物治疗心律失常的方法。