4JXS:
reference: Structure-based efforts to optimize a non-beta-lactam inhibitor of AmpC beta-lactamase., Hendershot JM, Mishra UJ, Smart RP, Schroeder W, Powers RA, Bioorg Med Chem. 2014 Jul 1;22(13):3351-9. doi: 10.1016/j.bmc.2014.04.051. Epub, 2014 May 5. PMID: 24835785

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