申请人:SUNTORY LTD
公开号:WO2001081334A2
公开(公告)日:2001-11-01
There is provided cyclic amidine compounds of the following formula (I) wherein: A?1 and A2¿ are hydrogen atom, optionally substituted alkyl group; optionally substituted aryl group; or optionally substituted heterocyclic group; and X is -C(R?1,R2)-C(R3,R4¿)-, -C(R5)=C(R6)-, -C(R?7,R8)-C(R9,R10)-C(R11,R12¿)-, or -C(R?13,R14)-C(R15,R16¿)-NH- (wherein, R?1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11R12, R13, R14, R15 and R16¿ are hydrogen atom; halogen atom; optionally substituted alkyl group; optionally substituted aryl group; or optionally substituted heterocyclic group;or pharmaceutically acceptable salts thereof. These compounds have good affinity for α4β2 nicotinic acetylcholine receptors and activate the same to thereby exert a preventive or therapeutic effect on cerebral dysfunction.