Patent ID: 7638540

Claim:
A compound represented by the formula (I) having a benzofuran ring: wherein Z is a group selected from the following formulas Z b and Z d wherein X 6 is wherein R 18 is a hydrogen atom, a hydroxyl group, —CHO, —COOAlk or a C 1-6 alkyl group (the alkyl group is optionally substituted by one or more hydroxyl groups), and X 9 is a bond, —CH═N— or —CO—NH—; X 7 is a bond, —HN—CO— or —N═CH—; R 9 is a hydrogen atom or a cyano group; R 10 is a hydrogen atom, a hydroxyl group, a C 1-6 alkyl group, a C 6-14 aryl group (the aryl group is optionally substituted by one or more C 1-6 alkoxy groups) or a C 6-14 aryl-C 1-6 alkyl group, or R 9 and R 10 optionally form, together with the carbon atoms bonded thereto, a heteroaromatic ring, whereby Z b becomes R 11 is a hydrogen atom, a hydroxyl group, a C 1-6 alkyl group, a C 6-14 aryl group (the aryl group is optionally substituted by one or more substituents selected from the group consisting of hydroxyl group and C 1-6 alkoxy group) or a C 6-14 aryl-C 1-6 alkyl group; X 8 is a bond or a C 1-6 alkylene group; and R 17 is a hydrogen atom, a C 1-6 alkyl group, a C 6-14 aryl group or an amino group (the amino group is optionally mono- or di-substituted by C 1-6 alkyl group(s)); X 1 is a bond or —O—; R 1 is a hydrogen atom, a halogen atom, a C 6-14 aryl group (the aryl group is optionally substituted by one or more halogen atoms) or a C 1-6 alkyl group; X 2 is a bond; R 2 is a C 6-14 aryl group (the aryl group is optionally substituted by one or more halogen atoms); and Y 1 and Y 2 are the same or different and each is a hydrogen atom, a halogen atom, a hydroxyl group, a C 1-6 alkoxy group, a C 6-14 aryl group (the aryl group is optionally substituted by one or more halogen atoms), or a pharmaceutically acceptable salt thereof.