2UXZ:
reference: Two-carbon-elongated HIV-1 protease inhibitors with a tertiary-alcohol-containing transition-state mimic., Wu X, Ohrngren P, Ekegren JK, Unge J, Unge T, Wallberg H, Samuelsson B, Hallberg A, Larhed M, J Med Chem. 2008 Feb 28;51(4):1053-7. Epub 2008 Jan 24. PMID: 18215014

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