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Inhibitory effects on SARS-CoV-2 Mpro of mixtures of tannic acid with puerarin, daidzein, and/or myricetin. All tests were performed in triplicate, and bars indicate the mean and standard deviation. *, **, ***: p < 0.05 compared to 25 μM, 45 μM, 65 μM of each puerarin, daidzein, and myricetin, respectively.
