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Simultaneous determination of ephedrine, pseudoephedrine, norephedrine and methylephedrine in Kampo medicines by high-performance liquid chromatography

Medicinal ChemistryKampo MedicinesGas ChromatographyMedicineAnalytical ChemistryPharmacotherapySimultaneous DeterminationLiquid ChromatographyChromatographic AnalysisPharmacologyPharmacokineticsChromatographyHigh-performance Liquid ChromatographyDrug Analysis