| abstract |
A compound represented by the following general formula (I) or a pharmaceutically acceptable salt thereof: in which A represents a phenylene group (the phenylene group may be optionally substituted with 1 to 3 groups selected from a C1-C3 alkyl group, a C1-C3 alkoxy group, and a halogen atom); B represents a 4 to 10 membered heterocyclic group containing 1 to 4 heteroatoms that may be the same or different and are selected from nitrogen, oxygen and sulfur (the heterocyclic group may be optionally substituted with 1 to 5 groups selected from the substituent group α) , a C6-C10 aryl group (the aryl group may be optionally substituted with 1 to 5 groups selected from the substituent group α), or a C3-C10 cycloalkyl group (the cycloalkyl group may be optionally substituted with 1 to 5 groups selected from the group substituent α); R1 represents a hydrogen atom or a C1-C3 alkyl group; R2 represents a hydrogen atom or a C1-C3 alkyl group; R3 represents a C1-C6 alkyl group, a C3-C10 cycloalkyl group, a C1-C3 alkoxy-C1-C3 alkyl group, or a hydroxy-C1-C3 alkyl group; R4 represents a hydrogen atom, a C1-C6 alkyl group, or a halogen atom; n represents an integer from 1 to 4; X represents methylene, - O-, -NH-, -N (C1-C3 alkyl) -, -C (> = O) -, -S-, -S (O) -, -S (O2) - or a single link |