BENZOCYCLOALKENE COMPOUNDS WITH MELATONINE RECEPTOR BINDING AFFINITY, THEIR PRODUCTION AND USE

摘要

A compound of formula (I) wherein R<1> and R<2> independently represent H or an optionally substituted hydrocarbon group; R<3> represents an optionally substituted hydrocarbon group: R<4> represents H or a hydrocarbon group; ring A represents a substituted benzene ring; X represents a C2-4 alkylene group etc.; and Y represents a bond or a lower alkylene group, or salts thereof is useful as prophylactic or therapeutic agents of diseases related with melatonin activity.