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Reduction of a commercially available CEST contrast agent (EuIII-DOTA-4AmC) to the T1-shortening EuII-containing analogue (EuII-DOTA-4AmC) using Zn0 under an atmosphere of N2. Oxidation to the +3 oxidation state yields the original complex. The table compares magnetic and spectroscopic properties between EuIII and EuII-containing complexes in the ground state.
