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HPLC chromatograms of isoflavonoids in (A) stems and (B) roots of Pueraria lobata; 1 = puerarin (11.7 minutes); 2 = daidzin (20.4 minutes); 3 = genistin (30.9 minutes); and 4 = daidzein (38.3 minutes). HPLC = high-performance liquid chromatography.
