Patent ID: 8236984

Claim:
A compound of the general formula (I) or a pharmaceutically acceptable salt, ester or prodrug thereof: wherein: each Y is independently a direct bond or —CH 2 —; each X is independently —NH—, —O—, —S—, —CH 2 —, —NR—, —CO—, —CONH—, —CONR—, —C═N—O—, —NHCO—, —NRCO—, —O—N═C—, —SO—, —SO 2 — or a direct bond, wherein each of R 1 , R 2 , R 3 and R 4 is independently F, Cl, Br, I, CF 3 , OCF 3 , R′, OR′, NR′R′, SOR′ or SO 2 R′, wherein R and R′ are each independently C 1 -C 3 alkyl which is straight or branched chain or cyclic optionally substituted by one or more halogen atoms; and each m, n, p and q is independently 0 to 4, wherein m+n+p+q>0; and wherein the linker is —O—(CH 2 ) r —O—in which r is an integer of from 5 to 11.