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  • Title: Tris(pyrone) chelates of Gd(III) as high solubility MRI-CA.
    Author: Puerta DT, Botta M, Jocher CJ, Werner EJ, Avedano S, Raymond KN, Cohen SM.
    Journal: J Am Chem Soc; 2006 Feb 22; 128(7):2222-3. PubMed ID: 16478170.
    Abstract:
    Two tripodal, hexadentate pyrone-based chelators have been prepared. These ligands form stable, soluble complexes with gadolinium(III). The complexes show aqueous stability comparable to that of [Gd(DTPA)]2- at pH 7.4. Evaluation by relaxometry shows that these complexes have two inner-sphere water molecules and a very fast water exchange rate. The solution behavior of these complexes suggests that they may be attractive as high relaxivity, next-generation magnetic resonance imaging contrast agents.
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