5OM9:
reference: Discovery of Mechanism-Based Inactivators for Human Pancreatic Carboxypeptidase A from a Focused Synthetic Library., Testero SA, Granados C, Fernandez D, Gallego P, Covaleda G, Reverter D, Vendrell J, Aviles FX, Pallares I, Mobashery S, ACS Med Chem Lett. 2017 Sep 22;8(10):1122-1127. doi:, 10.1021/acsmedchemlett.7b00346. eCollection 2017 Oct 12. PMID: 29057062

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