The general formula (I) Wherein one of R 1, represents a lower alkyl or the like which may have a substituent, represents an aliphatic heterocyclic group which may have a substituent, R 3, R 2 is - (wherein, represents a lower alkyl or the like which may have a substituent, Z, represents an oxygen atom or the like R 5 and R 6,) represents the like, n C (= Z) NR 5 R 6 is represents an integer of 1 to 3, (wherein, represents a hydrogen atom or the like R 5) W is a pharmaceutically acceptable salt thereof, or condensed heterocyclic derivative represented by the formula: represent like C-R 5 I provide and the like.一般式(I)[式中、R1は、置換基を有していてもよい低級アルキル等を表し、R2は、置換基を有していてもよい脂肪族複素環基等を表し、R3は、-C(=Z)NR5R6(式中、R5およびR6は、置換基を有していてもよい低級アルキル等を表し、Zは、酸素原子等を表す)等を表し、nは、1~3の整数を表し、WはC-R5(式中、R5は水素原子等を表す)等を表す]で表される縮環複素環誘導体またはその薬学的に許容される塩等を提供する。
