Patent ID: 7498344

Claim:
A compound having the formula (I′): wherein, R′ is a phenyl group optionally substituted with a substituent selected from the group consisting of a halogen atom, a hydroxyl group, a C1-C5 optionally branched alkoxy group, and a C1-C5 optionally branched alkyl group optionally substituted with a halogen atom; a phenoxy group optionally substituted with a substituent selected from the group consisting of a halogen atom, a hydroxyl group, a C1-C5 optionally branched alkoxy group, and a C1-C5 optionally branched alkyl group optionally substituted with a halogen atom; or a benzoyl group optionally substituted with a substituent selected from the group consisting of a halogen atom, a hydroxyl group, a C1-C5 optionally branched alkoxy group, a C1-C5 optionally branched alkyl group optionally substituted with a halogen atom, A is a connecting bond, B is an alkylene group optionally substituted with a hydroxyl group or an alkoxy group, E is an oxygen atom, X is a hydroxyl group, and Y and Z may be the same or different from each other and represent a hydrogen atom, a halogen atom, an alkoxy group, or an alkyl group optionally substituted with a halogen atom, provided that, when R′ is a phenyl group optionally substituted with a substituent selected from the group consisting of a halogen atom, a hydroxyl group, a C1-C5 optionally branched alkoxy group, and a C1-C5 optionally branched alkyl group optionally substituted with a halogen atom, B is not an unsubstituted alkylene group, and that when R′ is a phenoxy group optionally substituted with a substituent selected from the group consisting of a halogen atom, a hydroxyl group, a C1-C5 optionally branched alkoxy group, and a C1-C5 optionally branched alkyl group optionally substituted with a halogen atom, B is not an unsubstituted alkylene group, or its pharmaceutically acceptable salt.