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Structural details at the interface between the three compounds (EP, PEP, and MEP) and human ACE2 (PDB ID: 6M0J). Amino acid residues in green present the same ACE2-binding sites with SARS-CoV-2 RBD reported. Amino acid residues in purple present the different ACE2-binding sites with SARS-CoV-2 RBD
