2QP6:
reference: Carbonic Anhydrase Inhibitors: Bioreductive Nitro-Containing Sulfonamides with Selectivity for Targeting the Tumor Associated Isoforms IX and XII., D'Ambrosio K, Vitale RM, Dogne JM, Masereel B, Innocenti A, Scozzafava A, De Simone G, Supuran CT, J Med Chem. 2008 May 16;. PMID: 18481843

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