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Docking simulation of quinoxalines 4ad (A, C) and 4ca (B) in the active sites of human ACE2 (PDB code: 1R4L) and SARS-CoV-2 spike RBD (PDB code: 6M0J). (A) 3D and 2D interaction model of 4ad (in gray) with human ACE2 receptor. (B) 2D interaction model of 4ca with human ACE2 receptor. (C) 3D and 2D interaction model of 4ad (in gray) with SARS-CoV-2 spike RBD protein.
