6BFE:
reference: Optimization of Hydroxyethylamine Transition State Isosteres as Aspartic Protease Inhibitors by Exploiting Conformational Preferences., Bueno AB, Agejas J, Broughton HB, Dally R, Durham T, Espinosa JF, Gonzalez R, Hahn PJ, Marcos A, Rodriguez R, Sanz G, Soriano J, Timm DE, Vidal P, Yang HC, McCarthy J, J Med Chem. 2017 Oct 31. doi: 10.1021/acs.jmedchem.7b01304. PMID: 29088532

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