Patent ID: 8217032

Claim:
A compound of the formula: wherein: m is 0, 1 or 2; n is 2 wherein the corresponding fluoro moieties are at the 3- and 5-positions; R is H or methyl provided that if m is 1 or 2, then R must be H and that if m is 0, then R must be methyl; R 1 is H, SO 2 (n-C 4 -C 6 alkyl) or COR 2 ; X is O or NR 3 ; Y is O, S, SO or NR 4 ; R 2 is C 1 -C 6 alkyl; C 1 -C 6 alkoxy; NR 5 R 5a ; phenoxy; or phenyl optionally substituted with halo; R 3 and R 4 are independently H or C 1 -C 6 alkyl; and R 5 and R 5a are independently H, C 1 -C 6 alkyl or phenyl; or a pharmaceutical acid addition salt thereof.