5XHR:
reference: Modified Penicillin Molecule with Carbapenem-Like Stereochemistry Specifically Inhibits Class C beta-Lactamases., Pan X, He Y, Chen T, Chan KF, Zhao Y, Antimicrob Agents Chemother. 2017 Nov 22;61(12). pii: AAC.01288-17. doi:, 10.1128/AAC.01288-17. Print 2017 Dec. PMID: 28971874

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