4AEL:
reference: Discovery of 4-hydroxy-1,6-naphthyridine-3-carbonitrile derivatives as novel PDE10A inhibitors., Bauer U, Giordanetto F, Bauer M, O'Mahony G, Johansson KE, Knecht W, Hartleib-Geschwindner J, Carlsson ET, Enroth C, Bioorg Med Chem Lett. 2012 Mar 1;22(5):1944-8. Epub 2012 Jan 26. PMID: 22321214

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