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Pharmacophore features of the selected Mpro protease inhibitor. Hydrophobic group, hydrogen-bond donor, and aromatic ring are colored in light-blue, magenta, and brown, respectively. LPV is shown in stick model without H atoms. The five selected ligands were used to derive the common feature pharmacophore by using the “creating and validating a common feature pharmacophore” protocol of the Discovery studio (DS) software package, with the validating alignments of LPV and RBV.
