Invention Grant
US08258138B2 Potassium channel blockers 有权
钾通道阻滞剂

Potassium channel blockers
Abstract:
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.
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