2FW4:
reference: Carbonic anhydrase activators: The first X-ray crystallographic study of an adduct of isoform I., Temperini C, Scozzafava A, Supuran CT, Bioorg Med Chem Lett. 2006 Jul 24;. PMID: 16870440

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