2WLY:
reference: Chitinase Inhibition by Chitobiose and Chitotriose Thiazolines., Macdonald JM, Tarling CA, Taylor EJ, Dennis RJ, Myers DS, Knapp S, Davies GJ, Withers SG, Angew Chem Int Ed Engl. 2010 Mar 5. PMID: 20209544

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