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High-performance liquid chromatography (HPLC) chromatograms of five standard compound mixtures (a) and 70% ethanol extract of Cimicifugae Rhizoma (b). Chemical structures of five compounds (c). Peak identification: 1, caffeic acid; 2, ferulic acid; 3, isoferulic acid; 4, cimicifugic acid B; 5, cimicifugic acid F. Chromatographic conditions are described in the text. Detection was at 320 nm.
