4V2O:
reference: The Lysosomal Protein Saposin B Binds Chloroquine., Huta BP, Mehlenbacher MR, Nie Y, Lai X, Zubieta C, Bou-Abdallah F, Doyle RP, ChemMedChem. 2015 Nov 30. doi: 10.1002/cmdc.201500494. PMID: 26616259

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