Spectrally Undiscerned Isomers Might Lead to Erroneous Determination of Water Exchange Rates of paraCEST Eu(III) Agents - Cakic, Nevenka; Tickner, Ben; Zaiss, Moritz; Esteban-Gomez, David; Platas-Iglesias, Carlos; Angelovski, Goran (Inorganic Chemistry, 2017)