6DR4:
reference: Repurposing Triphenylmethane Dyes to Bind to Trimers Derived from Abeta., Salveson PJ, Haerianardakani S, Thuy-Boun A, Yoo S, Kreutzer AG, Demeler B, Nowick JS, J Am Chem Soc. 2018 Sep 19;140(37):11745-11754. doi: 10.1021/jacs.8b06568. Epub, 2018 Sep 6. PMID: 30125493

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