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HPLC chromatograms of mixed standard compounds (a) and SHXXD extract (b). Nine chromatographic peaks were identified: (1) jatrorrhizine, (2) baicalin, (3) palmatine, (4) berberine, (5) wogonoside, (6) baicalein, (7) aloe-emodin, (8) rhein, and (9) wogonin.
