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Syntheses of two Siderophore–fluoroquinolone conjugates with a potential reduction triggered linker for drug release are described. The “trimethyl lock” based linker incorporated in the conjugates was designed to be activated by taking advantage of the reductive pathway of bacterial iron metabolism. Electrochemical and LC–MS studies indicated that the linker is thermodynamically reducible by common...
Two desferrioxamine B-ciprofloxacin conjugates with ‘trimethyl-lock’ based linkers that are designed to release the antibiotic after esterase or phosphatase-mediated hydrolysis were synthesized. The potential esterase-sensitive conjugate 13 displayed moderate to good antibacterial activities against selected ferrioxamine-utilizing bacteria, although the activities were lower than the parent drug ciprofloxacin...
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