6CVY:
reference: Quinoxaline-Based Linear HCV NS3/4A Protease Inhibitors Exhibit Potent Activity against Drug Resistant Variants., Rusere LN, Matthew AN, Lockbaum GJ, Jahangir M, Newton A, Petropoulos CJ, Huang W, Kurt Yilmaz N, Schiffer CA, Ali A, ACS Med Chem Lett. 2018 May 17;9(7):691-696. doi: 10.1021/acsmedchemlett.8b00150., eCollection 2018 Jul 12. PMID: 30034602

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