The present invention provides a compound of formula (I)
or its salts or pharmaceutically acceptable derivatives thereof wherein X
1
, R
1
, R
2
, R
3
, R
4
, and R
5
are defined as set forth in the specification. The compounds are useful as potassium ion channel inhibitors.
本发明提供了一种公式(I)化合物或其盐或药学上可接受的衍
生物,其中X1,R1,R2,R3,R4和R5如规范中所述。这些化合物可用作
钾离子通道
抑制剂。