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Interaction of (A) aurantio-obtusin (yellow) and (B) 2-hydroxyemodin 1-methylether (pink) in the active site of vasopressin V1A receptor (V1AR). (C,D) represent 2D-binding diagrams of aurantio-obtusin and 2-hydroxyemodin 1-methylether in V1AR, respectively. Dotted-colored lines represent interaction types—green: H-bond interaction; maroon: π-π T-shaped; purple: π-sigma; pink: π-alkyl/alkyl interaction.
