5BNL:
reference: Deciphering the mechanism of carbonic anhydrase inhibition with coumarins and thiocoumarins., Maresca A, Temperini C, Pochet L, Masereel B, Scozzafava A, Supuran CT, J Med Chem. 2010 Jan 14;53(1):335-44. doi: 10.1021/jm901287j. PMID: 19911821

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