Patent ID: 7906540

Claim:
A compound according to formula IIa wherein: X is CH 2 ; Y is CH 2 or O; R 1 is hydrogen or C 1-6 alkyl; R 3 and R 4 are independently hydrogen, halogen, C 1-6 alkyl, C 1-6 alkoxy or C 3-5 cycloalkyl; R 5 is hydrogen, CH 2 OH, CH 2 OC(═O)(CH 2 ) n C(═O)OH, CH 2 OC(═O)C 1-6 alkyl where n is 2 to 5, or CH 2 OC(═O)CHR 5a NH 2 where R 5a is phenyl or C 1-6 lower alkyl; Ar is phenyl substituted with 1 to 3 groups independently selected from halogen, cyano, C 1-6 haloalkyl, C 3-5 cycloalkyl or C 1-6 alkyl; or, pharmaceutically acceptable salts thereof.