Patent ID: 7888347

Claim:
A compound of formula (I) or a pharmaceutically acceptable salt thereof: wherein: R 1 represents —C 1-6 alkyl, —C 3-7 cycloalkyl or —CH 2 —C 3-7 cycloalkyl, wherein said cycloalkyl groups may be optionally substituted by C 1-3 alkyl; X represents a bond or —CH 2 —, R 2 represents -aryl, -aryl-aryl, -aryl-heteroaryl, -aryl-heterocyclyl, -heteroaryl, -heteroaryl-aryl, -heteroaryl-heteroaryl, -heteroaryl-heterocyclyl, -heterocyclyl, -heterocyclyl-aryl, -heterocyclyl-heteroaryl or -heterocyclyl-heterocyclyl; wherein said aryl, heteroaryl and heterocyclyl groups of R 2 may be optionally substituted by one or more substituents which may be the same or different, and which are selected from the group consisting of halogen, hydroxy, cyano, nitro, ═O, C 1-6 alkyl, haloC 1-6 alkyl, —O-haloC 1-6 alkyl, —O—C 1-6 alkyl, —C 1-6 alkyl-O—C 1-6 alkyl, —CO 2 R 4 , —COR 4 , —C 1-6 alkyl-COR 4 , —SR 4 , —SO 2 R 4 , —SOR 4 , —OSO 2 R 4 , —C 1-6 alkyl-SO 2 R 4 , —C 1-6 alkyl-NR 4 SO 2 R 5 , —C 1-6 alkyl-SO 2 NR 4 R 5 , —NR 4 R 5 , —C 1-6 alkyl-NR 4 R 5 , —C 3-8 cycloalkyl-NR 4 R 5 , —CONR 4 R 5 , —NR 4 COR 5 , —C 1-6 alkyl-NR 4 COR 5 , —C 1-6 alkyl-CONR 4 R 5 , —NR 4 SO 2 R 5 , —OCONR 4 R 5 , —NR 4 CO 2 R 5 , —NR 6 CONR 4 R 5 and —SO 2 NR 4 R 5 , wherein R 4 , R 5 and R 6 independently represent hydrogen, C 1-6 alkyl, or wherein —NR 4 R 5 may represent a nitrogen containing heterocyclyl group; and wherein R 4 , R 5 and R 6 may be optionally substituted by one or more substituents which may be the same or different, and which are selected from the group consisting of halogen, hydroxy, cyano, amino, nitro and ═O.