Volkensiflavone (Talbotaflavone) is a natural product found in astragalus and garcinia. It has the function of plant metabolite, is a secondary metabolic product. Volkensiflavone is a biflavonoid belonging to the hydroxyl and oxyflavone groups. Volkensiflavone can be used as an adjuvant in the antibiotic treatment of multidrug-resistant Staphylococcus aureus that overexpresses efflux pumps.