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Molecular docking of active compounds with SARS-CoV S1 subunit. A represents binding position of all the five active compounds within RBD. B to F exhibit interaction mode of ginsenoside Ra2 (ZZY-8), ginsenoside Rb1 (ZZY-9), ginsenoside Rb3 (ZZY-13), glycyrrhizic acid (ZZY-44), berberine chloride (ZZY-54) with RBD domain, respectively.
