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A schematic of 2D LIGPLOT drawings of 5e and hydroxychloroquine against 7BQY protease using the 2D LIGPLOT representation of the protein–ligand interactions [44]; (a) a diagram showing the hydrogen bonds and hydrophobic residues of 5e with 7BQY; (b) a diagram showing the hydrogen bonds and hydrophobic residue interactions of hydroxychloroquine with 7BQY protease. A key to the symbols is reported before [45]. The cutoff for the nonbonded interactions is 3.9 Å.
