Patent ID: 7875633

Claim:
A compound of formula I, or a pharmaceutically-acceptable salt thereof; wherein: R 1 and R 2 are each independently selected from: a hydrogen atom, or a lower alkyl group optionally substituted with one or more substituents, and R 1 , taken together with L, Z 2 and the nitrogen atom adjacent to R 1 , may form an aliphatic nitrogen-containing hetero ring optionally substituted with one or more substituents, and R 1 and R 2 , taken together with the nitrogen atom to which they bond, may form an aliphatic nitrogen-containing hetero ring optionally substituted with one or more substituents; X represents a methine group optionally substituted with a halogen; Y represents —CH 2 —O—, —CH═CH— or —CH 2 —CH 2 —; Z 1 represents a single bond, a C 1-4 alkylene group optionally substituted with one or more substituents, a C 1-4 alkylene-O— optionally substituted with one or more substituents, a C 1-3 alkylene-O—C 1-3 alkylene group optionally substituted with one or more substituents, a C 2-4 alkenylene group optionally substituted with one or more substituents, or —NR—, R represents a hydrogen atom, or a lower alkyl group optionally substituted with one or more substituents; Z 2 represents a single bond or a C 1-4 alkylene group optionally substituted with one or more substituents; L represents a methylene group optionally substituted with one or more substituents, or a C 3-8 cycloalkylene group optionally substituted with one or more substituents, or L, taken together with Z 2 , R 1 and the nitrogen atom adjacent to R 1 , may form an aliphatic nitrogen-containing hetero ring optionally substituted with one or more substituents; provided that, when Z 1 and Z 2 are single bonds at the same time, then L is not a methylene group; Ar represents an aromatic carbocyclic group optionally substituted with one or more substituents, or an aromatic heterocyclic group optionally substituted with one or more substituents.