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Typical full-scan product ion chromatograms of standard solutions (a), extract from crude samples (b), and cell lysates after incubation with Ch. majus for 30 min (c). Peak 1: magnoflorine; 2: protopine; 3: chelidonine; 4 coptisine; 5: allocryptopine; 6: sanguinarine; 7: berberine; 8: chelerythrine.
