Patent ID: 6869589

Claim:
A compound which is capable of being radiolabelled of general Formula (I): in which n represents an integer from 2 to 4, where each R 4 and R 5 is independently selected from —H, CH 3 , COOH, NO 2 , CH 2 OH, H 2 PO 4 , HSO 3 , CN, C(═O)NH 2 and CHO; X and Y are the same or different and are selected from the group consisting of C—R, N, P and C—Z in which R is selected from hydrogen, halogen, hydroxyl, nitro, nitroso, amino, optionally substituted alkyl, optionally substituted aryl, optionally substituted aralkyl, cyano, —COOR′, COCOOR′, NH—COCH 2 Br, —NH—CO—CH═CH—COOR′ in which R′ is a hydrogen atom or alkyl group, wherein at least one of X and Y is C—Z; W is selected from the group of NH, S and O; and Z is a functionalised vinyl pyridyl group which is capable of binding said compound of formula (I) to a molecular recognition unit, selected from or a pharmaceutically acceptable salt thereof.