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Chromatographic fingerprint of Rhizoma Coptidis extract. Number shows in the bracket(s) represent the relative retention of the peak to the marker peak: 1 (0.81); 2 (0.88); 3 (0.89, jatrorrhizine); 4 (0.90); 5 (0.93, coptisine); 6 (0.98, palmatine); 7 (marker, berberine).
