Unprecedented fast and efficient complexation of Sc was demonstrated with the chelating agent AAZTA (AAZTA=1,4-bis(carboxymethyl)-6-[bis(carboxymethyl)]amino-6-methylperhydro-1,4-diazepine) under mild experimental conditions. The robustness of the Sc(AAZTA) chelate and conjugated biomolecules thereof is further shown by in vivo PET imaging in healthy and tumor mice models. The new results pave the way towards development of efficient Sc-based radiopharmaceuticals using the AAZTA chelator.

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Unprecedented fast and efficient complexation of ScIII was demonstrated with the chelating agent AAZTA (AAZTA=1,4‐bis(carboxymethyl)‐6‐[bis(carboxymethyl)]amino‐6‐methylperhydro‐1,4‐diazepine) under mild experimental conditions. The robustness of the 44Sc(AAZTA)− chelate and conjugated biomolecules thereof is further shown by in vivo PET imaging in healthy and tumor mice models. The new results pave the way towards development of efficient Sc‐based radiopharmaceuticals using the AAZTA chelator.

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