5KIR:
reference: Crystal structure of rofecoxib bound to human cyclooxygenase-2., Orlando BJ, Malkowski MG, Acta Crystallogr F Struct Biol Commun. 2016 Oct 1;72(Pt 10):772-776. Epub 2016, Sep 22. PMID: 27710942

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