Patent ID: 7504397

Claim:
A compound of formula I: A-B—C (I) and isomers and salts thereof wherein: B is selected from the group consisting of: A is: R A3 and R A5 are independently selected from halo, OR O and R AC ; R A4 is selected from H, OR O , CH 2 OH, CO 2 H, NHSO 2 Me and NHCOMe; R A2 and R A6 are independently selected from H, halo and OR O ; or R A3 and R A4 together with the carbon atoms to which they are attached, or R A2 and R A3 together with the carbon atoms to which they are attached, may form a C 5-6 heterocylic or heteroaromatic ring, containing at least one nitrogen ring atom; where 1, 2, or 3 of R A2 to R A6 are not H; C is: where X is selected from N and CH, Y is selected from N and CH, and Z is selected from N and CR C6 provided that two of X, Y and Z are N; R C3 is selected from H, halo and an optionally substituted N-containing C 5-7 heterocyclic group; R C5 is a group selected from: which group may be optionally substituted by one or two C 1-4 alkyl groups or a carboxy group; R C6 is H; or, when X and Y are N, R C5 and R C6 (when Z is CR C6 ) together with the carbon atoms to which they are attached may form a fused C 6 aromatic ring selected from the group consisting of: R O is H or Me; and R AC is H or C 1-4 alkyl.