Tetracyclic condensed heterocyclic compounds for the treatment of senile dementia.

摘要

A novel compound of the formula wherein Ar represents a tetracyclic fused heterocyclic group which may be substituted; R<1> represents H or a hydrocarbon group which may be substituted; Y represents an amino or nitrogen-containing saturated heterocyclic group which may be substituted, its salt, inhibiting excellent cholinesterase inhibitory activity and monoamine uptake inhibitory activity, thus being useful as therapeutic and/or prophylactic medicaments of senile dementia.