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Binding conformation (compounds are represented as green sticks and key interacting residues are displayed in thin red wireframe representation) and molecular interaction between SARS-CoV-2 Mpro and (A) Dihydroergotamine (ZINC000003978005) (B) α-ketoamide 13b inhibitor (O6K). The hydrophobic interactions are indicated by red arcs with radiating spikes and green dashed lines correspond to hydrogen bonds.
