NEW ACTIVE SUBSTANCE PF1233A SUBSTANCE AND PF1233B SUBSTANCE, AND THEIR METHODS FOR PRODUCING THE SAME AND PHARMACEUTICAL COMPOSITION USING THE SAME

摘要

PROBLEM TO BE SOLVED: To obtain a new substance which has the inhibitory activity of a voltage-dependent potassium channel and is useful as a pharmaceutical. SOLUTION: A PF1233A substance expressed by formula (1) which is the substance having the inhibitory activity of a voltage-dependent potassium channel, and a PF1233B substance expressed by formula (2), are disclosed, and their methods for producing the same and pharmaceutical compositions using the same are also disclosed.