2F9V:
reference: Depeptidization efforts on P3-P2' alpha-ketoamide inhibitors of HCV NS3-4A serine protease: effect on HCV replicon activity., Bogen SL, Ruan S, Liu R, Agrawal S, Pichardo J, Prongay A, Baroudy B, Saksena AK, Girijavallabhan V, Njoroge FG, Bioorg Med Chem Lett. 2006 Mar 15;16(6):1621-7. Epub 2006 Jan 4. PMID: 16387495

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