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Binding interactions between compound 5 and the COX-2 binding site. (A) Conformation of the ligand in the receptor active site. (B) Intermolecular binding interaction displayed by Ligplot plus program. Hydrophobic bonds between compound 5 and COX-2, red dashed lines; H-bonds, green dashed lines; and protein residues involved in hydrophobic interactions, red arcs.
