3NS7:
reference: Succinic acid amides as P2-P3 replacements for inhibitors of interleukin-1beta converting enzyme (ICE or caspase 1)., Galatsis P, Caprathe B, Gilmore J, Thomas A, Linn K, Sheehan S, Harter W, Kostlan C, Lunney E, Stankovic C, Rubin J, Brady K, Allen H, Talanian R, Bioorg Med Chem Lett. 2010 Sep 1;20(17):5184-90. Epub 2010 Jul 8. PMID: 20656488

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