6PND:
reference: First Contact: 7-Phenyl-2-Aminoquinolines, Potent and Selective Neuronal Nitric Oxide Synthase Inhibitors That Target an Isoform-Specific Aspartate., Cinelli MA, Reidl CT, Li H, Chreifi G, Poulos TL, Silverman RB, J Med Chem. 2020 Apr 17. doi: 10.1021/acs.jmedchem.9b01573. PMID: 32302123

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