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Conjugates of trimethoprim (TMP) to sensitised terbium chelate complexes. Top: cs124-polyaminocarboxylates (n=1, diethylenetriamine pentaacetic acid (TMP-cDTPA); n=2, triethylenetetraamine hexaacetic acid (TMP-cTTHA)). Bottom: Lumi4®-Tb, a proprietary 2-hydroxyisophthalamide terbium complex (TMP-Lumi4).
