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For the purpose to develop novel 99mTc-labeled tumor imaging agents with SPECT, colchicine (CHC) was directly labeled by 99mTc using diethylene triamine pentacetate acid (DTPA) as bifunctional chelating agent. Trimethylcolchicinic acid, derivatived from colchicine, was conjugated to DTPA to get the new ligand DTPA-CHC, which was labeled by 99mTc in the presence of SnCl2 as reducing agent. The radiochemical...
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