2DXS:
reference: Discovery of conformationally constrained tetracyclic compounds as potent hepatitis C virus NS5B RNA polymerase inhibitors., Ikegashira K, Oka T, Hirashima S, Noji S, Yamanaka H, Hara Y, Adachi T, Tsuruha J, Doi S, Hase Y, Noguchi T, Ando I, Ogura N, Ikeda S, Hashimoto H, J Med Chem. 2006 Nov 30;49(24):6950-3. PMID: 17125247

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