2HWH:
reference: Structure-based design of a novel thiazolone scaffold as HCV NS5B polymerase allosteric inhibitors., Yan S, Appleby T, Larson G, Wu JZ, Hamatake R, Hong Z, Yao N, Bioorg Med Chem Lett. 2006 Nov 15;16(22):5888-91. Epub 2006 Aug 24. PMID: 16934455

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