3ZPU:
reference: Design and Synthesis of P1-P3 Macrocyclic Tertiary Alcohol Comprising HIV-1 Protease Inhibitors., Joshi A, Veron JB, Unge J, Rosenquist A, Wallberg H, Samuelsson B, Hallberg A, Larhed M, J Med Chem. 2013 Oct 25. PMID: 24160253

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