2X8B:
reference: Structural Evidence That Human Acetylcholinesterase Inhibited by Tabun Ages through O-Dealkylation., Carletti E, Colletier JP, Dupeux F, Trovaslet M, Masson P, Nachon F, J Med Chem. 2010 Apr 21. PMID: 20408548

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