7BQL:
reference: An enzymatic Alder-ene reaction., Ohashi M, Jamieson CS, Cai Y, Tan D, Kanayama D, Tang MC, Anthony SM, Chari JV, Barber JS, Picazo E, Kakule TB, Cao S, Garg NK, Zhou J, Houk KN, Tang Y, Nature. 2020 Oct;586(7827):64-69. doi: 10.1038/s41586-020-2743-5. Epub 2020 Sep, 30. PMID: 32999480

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