https://www.ncbi.nlm.nih.gov/Structure/pdb/6T4P
6T4P: Human Carbonic anhydrase II bound by napthalene-1-sulfonamide
carbonic anhydrase 22-(N-MORPHOLINO)-ETHANESULFONIC ACIDDIMETHYL SULFOXIDESODIUM IONZINC IONnaphthalene-1-sulfonamide
carbonic anhydrase iibound byhumannapthalene1