6E92:
reference: 3,17beta-Bis-sulfamoyloxy-2-methoxyestra-1,3,5(10)-triene and Nonsteroidal Sulfamate Derivatives Inhibit Carbonic Anhydrase IX: Structure-Activity Optimization for Isoform Selectivity., Andring JT, Dohle W, Tu C, Potter BVL, McKenna R, J Med Chem. 2019 Feb 28;62(4):2202-2212. doi: 10.1021/acs.jmedchem.8b01990. Epub , 2019 Feb 18. PMID: 30721041

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