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Updated: Apr 6, 2026

Visualization of Bacterial Resistance using Fluorescent Antibiotic Probes
Published on: March 2, 2020
Synthesis and biological evaluation of levofloxacin core-based derivatives with potent antibacterial activity against
Xiaoguang Huang1, Yingxia Bao1, Shaoxuan Zhu1
1Department of Medicinal Chemistry, Guangzhou Baiyunshan Pharmaceutical General Factory, Guangzhou 510515, China.
Abstract:
A series of C10 non-basic building block-substituted, levofloxacin core-based derivatives were synthesized in 43-86% yield. The antibacterial activity of these new fluoroquinolones was evaluated using a standard broth microdilution technique. The quinolone (S)-9-fluoro-10-(4-hydroxypiperidin-1-yl)-3-methyl-7-oxo-3,7-dihydro-2H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic acid L-arginine tetrahydrate exhibited superior antibacterial activity against quinolone-susceptible and resistant strains compared with the clinically used fluoroquinolones ciprofloxacin, levofloxacin, moxifloxacin, penicillin, and vancomycin, especially to the methicillin-resistant Staphylococcus aureus clinical isolates, penicillin-resistant Streptococcus pneumoniae clinical isolates, and Streptococcus pyogenes.
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