5W8V:
reference: Synthesis and Evaluation of Asymmetric Acyclic Nucleoside Bisphosphonates as Inhibitors of Plasmodium falciparum and Human Hypoxanthine-Guanine-(Xanthine) Phosphoribosyltransferase., Spacek P, Keough DT, Chavchich M, Dracinsky M, Janeba Z, Naesens L, Edstein MD, Guddat LW, Hockova D, J Med Chem. 2017 Aug 16. doi: 10.1021/acs.jmedchem.7b00926. PMID: 28813147

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