Patent ID: 8211929

Claim:
A compound of Formula VI, or a pharmaceutically acceptable salt thereof, wherein, m is 1 or 2 or 3; R 5 is C 1 -C 6 alkyl, or —C 0 -C 6 alkyl-R 21 ; X is H, or halo; Y is —C 0 -C 6 -alkyl-R 21 ; R 6 is —C 0 -C 6 -alkyl-R 21 or C 1 -C 6 alkyl; R 21 is a heterocyclyl group, which may be aromatic, having 3-15 ring members and from 1-5 hetero atoms where the hetero atoms are selected from nitrogen, phosphorus, oxygen and sulfur, aryl, or C 3 -C 7 cycloalkyl, and wherein aryl, C 3 -C 7 cycloalkyl, and heterocyclyl are optionally substituted with one or two moieties independently selected from halo, —S(O) 2 —C 1 alkyl, —C(O)—C 1 alkyl, —C(O)—H, —C 0 -C 1 alkyl-aryl, C 1 -C 6 alkyl and NR 13 R 14 wherein R 13 and R 14 are independently H or C 1 -C 6 alkyl.