4RYC:
reference: trans-(3S,4S)-Disubstituted pyrrolidines as inhibitors of the human aspartyl protease renin. Part I: Prime site exploration using an amino linker., Lorthiois E, Cumin F, Ehrhardt C, Kosaka T, Sellner H, Ostermann N, Francotte E, Wagner T, Maibaum J, Bioorg Med Chem Lett. 2015 Apr 15;25(8):1782-6. doi: 10.1016/j.bmcl.2015.02.039. , Epub 2015 Feb 21. PMID: 25782742

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