Patent ID: 8026362

Claim:
A compound according to formula I wherein: A is (a) CHR 3 ═CHR 2 , (b) CH 2 R 3 CH 2 R 2 , or, (c) CHR 2 ; either (i) R 1 is II and R 2 is hydrogen, C 1-3 alkyl, C 1-3 haloalkyl, C 2-6 alkenyl, or CH 2 OR c ; and, in addition, if A is either (a) or (b) R 2 can also be halogen, NR a R b , CN, or OR c ; or, (ii) R 1 is C 1-6 alkyl and R 2 is II; X 1 is O or S; X 2 is O, or, if A is (a), X 2 is O or NR d ; R 3 is hydrogen or C 1-3 alkyl; R 4 is halogen, C 1-6 alkyl, C 3-6 cycloalkyl C 1-6 haloalkyl or C 1-6 alkoxy; R a and R b are independently hydrogen, C 1-3 alkyl or C 1-6 acyl; R c and R d are independently hydrogen or C 1-3 alkyl; Ar is phenyl substituted with 1 to 3 groups independently selected from halogen, cyano, C 1-6 haloalkyl, C 1-6 alkyl, C 1-6 alkoxy or C 3-6 cycloalkyl; n is an integer from 1 to 3; or, pharmaceutically acceptable salts thereof.