The present invention provides a compound of formula (I)
or its salts or pharmaceutically acceptable derivatives wherein R
1
, R
2
, R
3
, X
1
, and A are defined herein. The compounds are useful as potassium ion channel inhibitors.
The present invention provides a compound of formula (I)
or its salts or pharmaceutically acceptable derivatives wherein R1, R2, R3, X1, and A are defined herein. The compounds are useful as potassium ion channel inhibitors.