6VH3:
reference: 3C-like protease inhibitors block coronavirus replication in vitro and improve survival in MERS-CoV-infected mice., Rathnayake AD, Zheng J, Kim Y, Perera KD, Mackin S, Meyerholz DK, Kashipathy MM, Battaile KP, Lovell S, Perlman S, Groutas WC, Chang KO, Sci Transl Med. 2020 Aug 3. pii: scitranslmed.abc5332. doi:, 10.1126/scitranslmed.abc5332. PMID: 32747425

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