N-(1,1-dihydroperfluoroalkoxyphenyl)-N{40 -(pyridyl)-substituted ureas

摘要

Certain compounds in which a carbon atom of a pyrrolidine or piperidine ring is bonded directly or through a methylene group to the nitrogen of a phenyl-substituted urea, and their pharmaceutically acceptable salts, are active anti-arrhythmic agents.