Patent ID: 6960688

Claim:
A compound of formula (I′): wherein: n is 1 or 2; R a is chloro, fluoro, bromo, nitro or methoxy; R b is phenyl, wherein said phenyl is substituted by at least one group selected from ii), optionally one or more groups selected from i) and iii) and optionally further substituted with one group selected from iv): i) —X a —R c wherein X a is —O—, —S—, —SO—, —SO 2 —NR d — or —CONR e — (wherein R d and R e each independently represents hydrogen or C 1-4 alkyl which C 1-4 alkyl is optionally substituted with one or more groups selected from hydroxy or C 1-4 alkoxy) and R c is selected from hydrogen or C 1-6 alkyl which C 1-6 alkyl is optionally substituted with one or more hydroxy or C 1-4 alkoxy, or X a is a direct bond and R c is C 1-6 alkyl which C 1-6 alkyl is optionally substituted with one or more hydroxy or C 1-4 alkoxy, with the proviso that —X a —R c is not C 1-4 alkyl or C 1-4 alkoxy; ii) a 4-12 membered heterocyclic moiety containing 1-4 heteroatoms selected independently from O, N and S which heterocyclic moiety may be aromatic or non-aromatic and is optionally substituted with one or more groups selected from hydroxy, halo, C 1-4 alkoxy, C 1-4 alkyl or cyano; iii) —X a —C 1-6 alkyl-X b —R c wherein X a and R c are as defined hereinbefore and X b is —S—, —SO—or —SO 2 —; iv) cyano, hydroxy, halo, C 1-4 alkoxy, C 1-4 alkyl; or a salt thereof; or a pharmaceutically acceptable in vivo cleavable prodrug of said compound of formula (I); or a pharmaceutically acceptable salt of said compound or said prodrug.