6FMK:
reference: Thioamide substitution to probe the hydroxyproline recognition of VHL ligands., Soares P, Lucas X, Ciulli A, Bioorg Med Chem. 2018 Mar 23. pii: S0968-0896(18)30348-1. doi:, 10.1016/j.bmc.2018.03.034. PMID: 29650462

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