Taniborbactam dihydrochloride (VNRX-5133 dihydrochloride) is a selective and potent novel cyclic boronic acid β-lactamase inhibitor with antimicrobial activity and significant inhibition of Gram-negative bacteria.Taniborbactam dihydrochloride inhibits KPC Taniborbactam dihydrochloride inhibits KPC-2, AmpC, OXA-48 and VIM-2 and can be used for the study of fungal infections.

Taniborbactam is a reversible and selective boronic acid-containing pan-spectrum β-lactamase inhibitor (IC50s: 8-530 nM). Taniborbactam has IC50s of 30 nM, 32 nM, 42 nM, 20 nM for KPC-2, AmpC, OXA-48, and VIM-2.

VNRX-5133 is an injectable broad-spectrum β-lactamase inhibitor. VNRX-5133 is a novel β-lactamase inhibitor with potent and selective direct inhibitory activity against both serines- and Metallo-β-lactamases.