6G3V:
reference: Famotidine, an Antiulcer Agent, Strongly Inhibits Helicobacter pylori and Human Carbonic Anhydrases., Angeli A, Ferraroni M, Supuran CT, ACS Med Chem Lett. 2018 Sep 4;9(10):1035-1038. doi:, 10.1021/acsmedchemlett.8b00334. eCollection 2018 Oct 11. PMID: 30344913

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