6MPQ:
reference: Targeting Multidrug-Resistant Acinetobacter spp.: Sulbactam and the Diazabicyclooctenone beta-Lactamase Inhibitor ETX2514 as a Novel Therapeutic Agent., Barnes MD, Kumar V, Bethel CR, Moussa SH, O'Donnell J, Rutter JD, Good CE, Hujer KM, Hujer AM, Marshall SH, Kreiswirth BN, Richter SS, Rather PN, Jacobs MR, Papp-Wallace KM, van den Akker F, Bonomo RA, MBio. 2019 Mar 12;10(2). pii: mBio.00159-19. doi: 10.1128/mBio.00159-19. PMID: 30862744

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).