3BGB:
reference: Achiral oligoamines as versatile tool for the development of aspartic protease inhibitors., Blum A, Bottcher J, Sammet B, Luksch T, Heine A, Klebe G, Diederich WE, Bioorg Med Chem. 2008 Sep 15;16(18):8574-86. Epub 2008 Aug 7. PMID: 18760609

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