6ZIS:
reference: Structure-Based Drug Discovery of N-((R)-3-(7-Methyl-1H-indazol-5-yl)-1-oxo-1-(((S)-1-oxo-3-(piperidin-4-yl)-1-(4-( pyridin-4-yl)piperazin-1-yl)propan-2-yl)amino)propan-2-yl)-2'-oxo-1',2'-dihydrosp iro[piperidine-4,4'-pyrido[2,3-d][1,3]oxazine]-1-carboxamide (HTL22562): A Calcitonin Gene-Related Peptide Receptor Antagonist for Acute Treatment of Migraine., Bucknell SJ, Ator MA, Brown AJH, Brown J, Cansfield AD, Cansfield JE, Christopher JA, Congreve M, Cseke G, Deflorian F, Jones CR, Mason JS, O'Brien MA, Ott GR, Pickworth M, Southall SM, J Med Chem. 2020 Jul 8. doi: 10.1021/acs.jmedchem.0c01003. PMID: 32558564

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