6W4Y:
reference: Structural basis for the stabilization of amyloidogenic immunoglobulin light chains by hydantoins., Yan NL, Santos-Martins D, Rennella E, Sanchez BB, Chen JS, Kay LE, Wilson IA, Morgan GJ, Forli S, Kelly JW, Bioorg Med Chem Lett. 2020 Aug 15;30(16):127356. doi: 10.1016/j.bmcl.2020.127356., Epub 2020 Jun 16. PMID: 32631553

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