4JQL:
reference: Synthesis of benzoquinone ansamycin-inspired macrocyclic lactams from shikimic Acid., Jeso V, Iqbal S, Hernandez P, Cameron MD, Park H, Lograsso PV, Micalizio GC, Angew Chem Int Ed Engl. 2013 Apr 26;52(18):4800-4. doi: 10.1002/anie.201301323., Epub 2013 Apr 2. PMID: 23554224

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