4ZV8:
reference: Coumarin Derivatives as Substrate Probes of Mammalian Cytochromes P450 2B4 and 2B6: Assessing the Importance of 7-Alkoxy Chain Length, Halogen Substitution, and Non-Active Site Mutations., Liu J, Shah MB, Zhang Q, Stout CD, Halpert JR, Wilderman PR, Biochemistry. 2016 Apr 5;55(13):1997-2007. doi: 10.1021/acs.biochem.5b01330. Epub, 2016 Mar 24. PMID: 26982502

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