Novel protein binding compounds of Formula (III): W-X-Y-(Z)n in which Y is a branching moiety, Z represents a polydentate ligand chelating agent that coordinates a metal ion;X is a spacer moiety;

• 本发明涉及分子式(III)的新的蛋白结合化合物：W-X-Y-(Z)n，其中Y是分支部分，Z代表与金属离子配位的多齿配体螯合剂；