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. 2021 May 24;157:104954. doi: 10.1016/j.micpath.2021.104954

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Fig. 7 — Free energy surface of the first two principal components for SARS CoV-2 (A) M^pro protein (B) M^pro-lopinavir complex and (C) M^pro-quercetin-3-rutinoside-7-glucoside complex.