The macroscopic and microscopic protonations of DTPA-GlucA2 (DTPA-bis(glucamide)) have been investigated using potentiometry, 1H and 13C NMR. The protonation behavior appears to be similar to that of the corresponding bis(alkylamides), showing that it is not affected by the presence of the polyhydroxy side chains. Consideration of the various possible protonation pathways leads to the conclusion that the differ...
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