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EVFEtOH and rutaecarpine inhibit the binding of S-protein to ACE2. (A) A standard inhibitor (calibrated to NIBSC code 20/136) was utilised as a positive control. EVFEtOH (B) and rutaecarpine (C) both disrupted the binding between the S-protein and the ACE2 receptor. The data represent the mean ± SD percentage of inhibition to control (with no drug treatment), and n = 4.
