3W8M:
reference: Inhibition of Heme Uptake in Pseudomonas aeruginosa by its Hemophore (HasAp ) Bound to Synthetic Metal Complexes., Shirataki C, Shoji O, Terada M, Ozaki S, Sugimoto H, Shiro Y, Watanabe Y, Angew Chem Int Ed Engl. 2014 Mar 10;53(11):2862-6. doi: 10.1002/anie.201307889., Epub 2014 Feb 7. PMID: 24604808

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