Compounds of the formula (I) or pharmaceutically acceptable salts thereof, wherein m, R1, R2, R3, R4 and R5 are as defined herein. Also disclosed are methods of making the compounds and using the compounds for treatment of diseases associated with potassium channel modulation.
                            化合物的公式为(I)或其药学上可接受的盐,其中m,R1,R2,R3,R4和R5的定义如本文所述。本文还揭示了制备这些化合物的方法,并使用这些化合物治疗与
钾通道调节相关的疾病。