Patent ID: 7056928

Claim:
A compound of formula (I) or a pharmaceutically acceptable salt thereof, in which: R 1 and R 2 are independently selected from H, or C 1-6 alkyl; R 3 is selected from the group consisting of C 1-6 alkyl, NH 2 and R 6 CONH; R 4 is H or C 1-6 alkyl; R 5 is selected from the group consisting of CH 2 F, CHF 2 , CF 3 CH 2 , CF 3 CHF and CF 3 CF 2 ; A is a 5- or 6-membered aryl, or a 5- or 6-membered aryl substituted by one or more R 7 ; R 6 is selected from the group consisting of H, C 1-6 alkyl, C 1-6 alkoxy, C 1-6 alkylOC 1-6 alkyl, phenyl, HO 2 CC 1-6 alkyl, C 1-6 alkyOCOC 1-6 alkyl C 1-6 alkylOCO, H 2 NC 1-6 alkyl, C 1-6 alkylOCONHC 1-6 alkyl and C 1-6 alkylCONHC 1-6 alkyl; R 7 is selected from the group consisting of halogen, C 1-6 -alkyl, C 1-6 alkyl substituted by one or more F, C 1-6 alkoxy, C 1-6 alkoxy substituted by one or more F, SO 2 NH 2 or SO 2 C 1-6 alkyl; and n is 1 to 4.