Patent ID: 7304174

Claim:
A compound represented by the following formula (1″): wherein R 1′ is a hydroxyl group or a C 1-6 alkoxy group, R 2′ is a hydroxyl group, a halogen atom, an amino group, a C 1-7 acylamino group, a halo C 1-6 alkyl group, a C 1-6 alkoxy-carbonyl group, a C 1-6 alkoxy group, a halo C 1-6 alkoxy group, a C 1-6 alkyl group, a hydroxy-C 1-6 alkyl group, a di(C 1-6 alkyl)amino group or a nitro group, R 4′ is a C 1-6 alkyl group or a C 3-6 cycloalkyl group, R 6′ is a halogen atom, a C 1-6 alkyl group, a C 1-6 alkoxy group or a halo C 1-6 alkyl group, or when R 7′ is adjacent, R 6′ and R 7′ are linked to form —CH═CH—CH═CH—, and R 7′ is a hydrogen atom, a halogen atom, a C 1-6 alkyl group, a C 1-6 alkoxy group or a halo C 1-6 alkyl group, an optically active form thereof, a pharmaceutically acceptable salt thereof, or an optically active form of the salt thereof.