Aminoketone compounds.

摘要

An aminoketone compound of the formula <CHEM> wherein ring A min means a five through eight-membered cyclic group which may be substituted and may contain one or two hetero atom(s) of O, S, N, as the ring-constituents; R<1> min means a hydrogen atom or a hydrocarbon residue which may be substituted; R<2> min means a hydrogen atom or a lower alkyl group; R<3> min means an aromatic group which may be substituted; R<4> min means a hydrogen atom, a lower alkyl group or aromatic group which may be substituted; n min means an integer of 2 to 7, or a salt thereof, is useful as an cholinesterase inhibitors and a cerebral function ameliorating agent.