3BKI:
reference: 6-Azido-7-nitro-1,4-dihydroquinoxaline-2,3-dione (ANQX) Forms an Irreversible Bond To the Active Site of the GluR2 AMPA Receptor., Cruz LA, Estebanez-Perpina E, Pfaff S, Borngraeber S, Bao N, Blethrow J, Fletterick RJ, England PM, J Med Chem. 2008 Aug 28. PMID: 18754610

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