Patent ID: 7419979

Claim:
A compound of formula (I) wherein R 2 is a group OR 4 or a group —Y—R 5 where R 4 is hydrogen or C 1-4 alkyl, Y is C 1-4 alkylene, R 5 is halo, hydroxy, C 1-2 alkoxy, C 1-2 alkoxyC 1-2 alkoxyC 1-4 , or a group NR 7 R 8 where R 7 and R 8 are independently selected from hydrogen, C 1-2 alkyl, hydroxyC 1-2 alkyl or alkoxyC 1-2 alkyl, or R 7 and R 8 together with the nitrogen atom to which they are attached form a saturated 5-6-membered heterocyclic ring which optionally contains an additional heteroatom; n is one or two and each R 1 is independently selected from halo, haloC 1-2 alkyl, hydroxy, amino, C 1-2 alkylamino or di-C 1-2 dialkylamino; or a pharmaceutically acceptable salt thereof.