2N7N:
reference: Discovery of Novel Potent and Selective Agonists at the Melanocortin3 Receptor., Carotenuto A, Merlino F, Cai M, Brancaccio D, Yousif AM, Novellino E, Hruby VJ, Grieco P, J Med Chem. 2015 Nov 24. PMID: 26599352

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