Patent ID: 8497397

Claim:
A compound having Formula (I′) or a pharmacologically acceptable salt thereof: wherein, R 5 represents an isobutyloxy group, a cyclopropylmethoxy group, a 2-cyclopropylethoxy group, a 1-methylcyclopropylmethoxy group, a 3,3,3-trifluoropropyloxy group, a 4,4,4-trifluorobutyloxy group, a 2-phenylethoxy group, a 2-(4-methoxyphenyl)ethoxy group, a 2-(3-methoxyphenyl)ethoxy group, a 2-(4-chlorophenyl)ethoxy group, a 2-(4-(N,N-dimethylamino)phenyl)ethoxy group, a 4-chlorophenoxy group, or a 4-trifluoromethylphenoxy group; R 6 represents a substituent independently selected from an ethoxy group, a trifluoromethyl group, a cyclopropyl group, a cyclopropyloxy group, a difluoromethoxy group, a trifluoromethoxy group, and a 2,2-difluoroethoxy group; and R 7 is selected from a C 2 -C 3 haloalkyl group, a C 2 -C 3 hydroxyalkyl group which may be protected by a hydroxyl protecting group, and a C 1 -C 3 alkyl group substituted with 1-hydroxycyclopropyl group.