5TZ5:
reference: Vinylogous Dehydration by a Polyketide Dehydratase Domain in Curacin Biosynthesis., Fiers WD, Dodge GJ, Sherman DH, Smith JL, Aldrich CC, J Am Chem Soc. 2016 Dec 14;138(49):16024-16036. Epub 2016 Nov 30. PMID: 27960309

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