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Predicted binding of scutellarein (a), luteolin (b), and hispidulin (c) to HIV-1 PR. Carbon is colored green, while oxygen, hydrogen, nitrogen, and sulfur atoms are colored red, white, blue, and yellow, respectively. The blue dotted lines represent π-π interactions, the green dotted line shows a π-cation interaction and the hydrogen bond is depicted as a yellow dotted line.
