Patent ID: 8124807

Claim:
A compound of a formula (I) or a pharmaceutically-acceptable salt thereof: wherein, Z is (II-1): m indicates 0, 1 or 2; Y represents CR 3 ; R 1 represents methyl, ethyl, propyl, butyl, cyclopropyl, phenyl, 2-pyridyl, 3-pyridyl, 4-pyridyl, 2-methoxyphenyl, pyrimidin-2-yl, 3-methoxyphenyl, 4-methoxyphenyl, 2-fluorophenyl, 3-fluorophenyl, 4-fluorophenyl, 2-chlorophenyl, 3 chlorophenyl, 4-chlorophenyl, 1-methyl-1H-imidazole-4-yl, 1H-imidazole-4-yl, 5-methyl-1,3,4-thiadiazol-2-yl or 1,3,4-thiadiazol-2-yl; R 2 represents phenyl, 2-fluorophenyl, 3-fluorophenyl, 4-fluorophenyl, 2-chlorophenyl, 3-chlorophenyl, 4-chlorophenyl, 2-methoxyphenyl, 3-methoxyphenyl, 4-methoxyphenyl, 2-methylphenyl, 3-methylphenyl, 4-methylphenyl, 2-isopropylphenyl, 3-isopropylphenyl, 4-isopropylphenyl, 2-isopropoxyphenyl, 3-isopropoxyphenyl, 4-isopropoxyphenyl, 2-benzylphenyl, 3-benzylphenyl, 4-benzylphenyl, 2-benzyloxyphenyl, 3-benzyloxyphenyl, 4-benzyloxyphenyl, 5-isopropoxyphenylpyridin-2-yl, 6-isopropoxyphenylpyridin-3-yl, 5-isopropoxypyrimidin-2-yl, 3-methoxypyridin-2-yl, 3-cyclopropyl-1H-pyrazol-5-yl or 5-isopropoxy-1H-pyrazol-3-yl; R 3 and R 4 each independently represent a hydrogen atom; M 1 , M 2 , M 3 and M 4 each independently represent a hydrogen atom.