Benzocycloalkene compounds, their production and use
申请人:Takeda Chemical Industries, Ltd.
公开号:US06235789B1
公开(公告)日:2001-05-22
A compound of the formula
wherein R1 and R2 are H, a hydrocarbon group or a heterocyclic group, or R1 and R2 are combinedly a spiro ring; R3 is a hydrocarbon group, a substituted amino group, a substituted hydroxyl group or a heterocyclic group; R4 is H or alkyl; ring A is a substituted benzene ring; m and n denote 1 to 4; overscore (.........)} means a single or double bond or a salt, a process of producing thereof and a composition having a binding affinity for melatonin receptor.