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Nacubactam (OP0595 free acid) is a potent non-β-lactam-β-lactamase inhibitor with activity against class A and class C β-lactamases. Nacubactam (OP0595 free acid) acts as a penicillin binding protein (PBP) 2-active antibacterial, and gives β-lactamase-independent potentiation of β-lactams targeting other PBPs[1][2]. non-β-lactam-β-lactamase[1]

[1]. Monogue ML, et al. In Vivo Efficacy of Meropenem with a Novel Non-β-Lactam-β-Lactamase Inhibitor, Nacubactam, against Gram-Negative Organisms Exhibiting Various Resistance Mechanisms in a Murine Complicated Urinary Tract Infection Model. Antimicrob Agents Chemother. 2018 Aug 27;62(9). [2]. Livermore DM, et al. Activity of OP0595/β-lactam combinations against Gram-negative bacteria with extended-spectrum, AmpC and carbapenem-hydrolysing β-lactamases. J Antimicrob Chemother. 2015 Nov;70(11):3032-41.

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