| http://www.w3.org/ns/prov#value | - R4 is a group other than a chelating group selected from a spacer group, a reactive functional group, a targeting group, a solubilizing group, a labeling group, an RM group, where RM is a group which carries a cyclic olefin group which reacts by ROMP, or a ROMP polymer side branch formed by ROMP polymerization from the RM group; wherein the metal chelating polymer contains at least one R3 group an
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