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Paeoniae Radix aqueous extract and the active ingredients. Paeoniae Radix aqueous extract (PRAE) were prepared from the traditional Chinese herb Peony root. The extract could interrupt the hemolysis of α-toxin. There are five main active ingredients in the extract: albiflorin, benzoylpaeoniflorin, oxypaeoniflorin, paeonol, and paeoniflorin. The chemical structures of the five ingredients were illustrated in the Figure.
