5MGZ:
reference: Structural and Functional Basis of C-Methylation of Coumarin Scaffolds by NovO., Sadler JC, Chung CH, Mosley JE, Burley GA, Humphreys LD, ACS Chem Biol. 2017 Jan 13. doi: 10.1021/acschembio.6b01053. PMID: 28068060

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