Patent ID: 8524194

Claim:
Compound having the formula (I) wherein Y is O, CH 2 , (CH 2 ) 2 , S, NH, or C(═O)NH; X represents 1-5 substituents, wherein said substituents can be the same or different wherein at least one of said substituents comprises Br, I, N 3 , NO 2 , or R—SO 3 , wherein R is an optionally substituted C1-5 alkyl group or an optionally substituted phenyl group and wherein at least one of said substituents comprises a radioisotope suitable for PET and/or SPECT and/or a β-emitter Z is S; Q is selected from the group consisting of 3-pyridyl and carboxyl; and R is selected from the group consisting of C(═O)—NH—OH,