Quick preparative separation of natural naphthopyranones with antioxidant activity by high-speed counter-current chromatography
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The natural naphthopyranones paepalantine (1), paepalantine-9O-β-D-glucopyranoside (2) and paepalantine-9-O-β-D-allopyranosyl-(1→6)-O-β-D-glucopyranoside (3) were separated in a preparative scale from the ethanolic extract of the capitula of Paepalanthus bromelioides by high-speed counter-current chromatography (HSCCC). The solvent system used was composed of water-ethanol-ethyl acetate-hexane (10:4:10:4, v/v/v/v). This technique led to the separation of the three different naphthopyranone glycosides in pure form in approximately 7 hours. Paepalantine showed a good antioxidant activity when assayed by the DPPH radical spectrophotometric assay.
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Antioxidant Activity, High-Speed Counter-Current Chromatography, Naphthopyranone Glycosides, Antioxidants, Brazil, Chromatography, High Pressure Liquid, Chromatography, Thin Layer, Countercurrent Distribution, Eriocaulaceae, Ethanol, Free Radicals, Glycosides, Heterocyclic Compounds, 3-Ring, Naphthalenes, Plant Extracts, Pyrones, Paepalanthus
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Inglês
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Zeitschrift fur Naturforschung - Section C Journal of Biosciences, v. 57, n. 11-12, p. 1051-1055, 2002.
