Patent ID: 7576212

Claim:
A compound of the formula: wherein R1 is optionally substituted aryl, optionally substituted heteroaryl, or optionally substituted cycloalkyl; R2 is H, optionally substituted alkyl, nitro, CO 2 R7, CONR5R6 or halo; R3 and R4 are H, NR5R6, NC(O)R7, halo, trifluoromethyl, optionally substituted alkyl, CONR5R6, CO 2 R7, cyano or optionally substituted alkoxy; R5 and R6 may be the same or different and may be H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or optionally substituted cycloalkyl; or R5 and R6 may together form a saturated, unsaturated or partially saturated 4 to 7 member ring, wherein said ring may optionally comprise one or more further heteroatoms selected from N, O or S; R7 is H or optionally substituted alkyl; A is halo, or a group of formula X-L-Y; X is O, S or NR8; R8 is H or optionally substituted alkyl; L is (CH 2 ) n , where n is 1, 2, 3 or 4; and Y is optionally substituted aryl, an optionally substituted heterocyclic group, optionally substituted alkyl, optionally substituted alkenyl or optionally substituted cycloalkyl; or a pharmaceutically acceptable salt thereof.