5FD0:
reference: N-Acetyl glycals are tight-binding and environmentally insensitive inhibitors of hexosaminidases., Santana AG, Vadlamani G, Mark BL, Withers SG, Chem Commun (Camb). 2016 Jun 28;52(51):7943-6. doi: 10.1039/c6cc02520j. Epub 2016, Jun 2. PMID: 27253678

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