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Purification of the seven tetranortriterpenoids in neem (Azadirachta indica) seed by counter-current chromatography sequentially followed by isocratic preparative reversed-phase high-performance liquid chromatography

Bioassay-guided IsolationMedicineCounter-current ChromatographyAnalytical ChemistryAzadirachta IndicaPhytochemicalPhytochemistryPharmacologyChromatography