Patent ID: 8623898

Claim:
A compound of the formula [I] or a pharmaceutically acceptable salt thereof: wherein R 1 represents a hydrogen atom, a C 1-6 alkyl group, a C 3-6 cycloalkyl group, a C 1-6 haloalkyl group, or a C 1-6 alkoxy C 1-6 alkyl group; R 2 represents a hydrogen atom, a C 1-6 alkyl group, a halogen atom, or a C 1-6 alkoxy group; or, alternatively, R 1 and R 2 may, taken together, form a C 3-4 alkylene group; Ar represents a phenyl group or a naphthyl group, provided that the phenyl or naphthyl group may be substituted by 1 to 5 substituents selected from among a C 1-6 alkyl group, a C 1-6 alkoxy group optionally substituted by a C 3-6 cycloalkyl group, a C 3-6 cycloalkoxy group, a C 1-6 haloalkyl group, a C 1-6 haloalkoxy group, a halogen atom, a phenyl group (which phenyl group may be substituted by 1 to 5 substituents selected from among a halogen atom, a C 1-6 alkyl group, a C 1-6 hydroxyalkyl group, a C 1-6 cyanoalkyl group, a C 1-6 alkoxy group, a C 2-7 alkoxycarbonyl group, a C 1-6 haloalkyl group, a C 1-6 haloalkoxy group, and a phenoxy group), a phenoxy group that may be substituted by 1 to 5 halogen atoms, a pyridyl group, an imidazolyl group, a pyrazolyl group, and a cyano group; Y represents a nitrogen atom or the formula CH; Z represents a single bond or an oxygen atom; A represents a single bond or a C 1-3 alkylene group; E represents a C 1-3 alkylene group that may be substituted by a C 2-7 alkoxycarbonyl group, a phenyl group or a C 1-6 hydroxyalkyl group; G represents an oxygen atom, a sulfur atom, or the formula SO 2 ; R 3 , R 4 , R 5 , and R 6 , which may be the same or different, represent a hydrogen atom or a C 1-6 alkyl group.