5TFX:
reference: Intramolecular oxidative deselenization of acylselenoureas: a facile synthesis of benzoxazole amides and carbonic anhydrase inhibitors., Angeli A, Peat TS, Bartolucci G, Nocentini A, Supuran CT, Carta F, Org Biomol Chem. 2016 Dec 28;14(48):11353-11356. Epub 2016 Nov 28. PMID: 27892589

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