5CXO:
reference: Enzymology of Pyran Ring A Formation in Salinomycin Biosynthesis., Luhavaya H, Dias MV, Williams SR, Hong H, de Oliveira LG, Leadlay PF, Angew Chem Int Ed Engl. 2015 Sep 17. doi: 10.1002/anie.201507090. PMID: 26377145

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