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Direct characterization of isoquinoline alkaloids in a crude plant extract by ion-pair liquid chromatography–electrospray ionization tandem mass spectrometry: example of Eschscholtzia californica

BiochemistryMedicineBioanalysisMass SpectrometryEschscholtzia CalifornicaSecondary MetaboliteAnalytical ChemistryLiquid ChromatographyPhytochemistryPharmacologyIsoquinoline AlkaloidsChromatographyDrug Analysis