4NNC:
reference: Structural Basis for Bacterial Quorum Sensing-mediated Oxalogenesis., Oh J, Goo E, Hwang I, Rhee S, J Biol Chem. 2014 Apr 18;289(16):11465-75. doi: 10.1074/jbc.M113.543462. Epub, 2014 Mar 10. PMID: 24616091

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