4CQ0:
reference: Cyclic Secondary Sulfonamides: Unusually Good Inhibitors of Cancer-Related Carbonic Anhydrase Enzymes., Moeker J, Peat TS, Bornaghi LF, Vullo D, Supuran CT, Poulsen SA, J Med Chem. 2014 Apr 11. PMID: 24689792

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