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Large-scale separation of alkaloids from Gelsemium elegans by pH-zone-refining counter-current chromatography with a new solvent system screening method

New Solvent SystemBiochemistryLarge-scale SeparationMedicineSeparation ScienceBioanalysisBioassay-guided IsolationAnalytical ChemistryToxicologyGelsemium ElegansPhytochemistryPharmacologyChromatographic AnalysisChromatography