Patent ID: 8143282

Claim:
A compound of the formula (I): wherein R 1 is a group of formula: —(CR 20 R 21 ) m —(CR 22 R 23 ) n —(CR 24 R 25 ) o —NR 26 R 27 ; R 2 is selected from the group consisting of: alkyl which may be unsubstituted or substituted with F, cyano, C 2 -C 6 alkenyl, or C 2 -C 6 alkynyl, and heteroalkyl which may be unsubstituted or substituted by ═O; each R 20 , R 21 , R 22 , R 23 , R 24 and R 25 is independently selected from the group consisting of: H and methyl; each R 26 and R 27 is independently selected from the group consisting of H, hydroxylalkyl and alkyl; m, n and o are integers independently selected from the group consisting of 0, 1, 2, 3 and 4; or a pharmaceutically acceptable salt or prodrug thereof.