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Quorum sensing-IN-2 (compound 23e) is a quorum sensing inhibitor, which can reduce the pathogenicity of bacteria without affecting bacterial growth. Quorum sensing-IN-2 inhibits bacterial infections with little hemolytic activity. Quorum sensing-IN-2 shows synergistic effect with Ciprofloxacin (HY-B0356) in the bacteremia model infected with P. aeruginosa PAO1[1].

[1] Zhang P, et al. Design and Synthesis of 4-Fluorophenyl-5-methylene-2(5H)-furanone Derivatives as Potent Quorum Sensing Inhibitors. J Med Chem. 2023 Jul 13;66(13):8441-8463. DOI:10.1021/acs.jmedchem.2c01866