6E6Y:
reference: Structural Basis for Enzymatic Off-Loading of Hybrid Polyketides by Dieckmann Condensation., Cogan DP, Ly J, Nair SK, ACS Chem Biol. 2020 Oct 16;15(10):2783-2791. doi: 10.1021/acschembio.0c00579., Epub 2020 Oct 5. PMID: 33017142

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