3BG8:
reference: Clavatadine A, a natural product with selective recognition and irreversible inhibition of factor XIa., Buchanan MS, Carroll AR, Wessling D, Jobling M, Avery VM, Davis RA, Feng Y, Xue Y, Oster L, Fex T, Deinum J, Hooper JN, Quinn RJ, J Med Chem. 2008 Jun 26;51(12):3583-7. PMID: 18510371

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