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Example of an HPLC-DAD chromatogram of extracts from different parts of C. majus: (b) roots, (c) fruits, and (d) herbs and (a) standards of investigated alkaloids: (1) protopine, (2) allocryptopine, (3) chelidonine, (4) coptisine, (5) sanguinarine, (6) berberine, and (7) chelerythrine.
