Leitão, Gilda G.Leitão, Suzana G.Vilegas, Wagner [UNESP]2014-05-272014-05-272002-11-01Zeitschrift fur Naturforschung - Section C Journal of Biosciences, v. 57, n. 11-12, p. 1051-1055, 2002.0939-5075http://hdl.handle.net/11449/67016The 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.1051-1055engAntioxidant ActivityHigh-Speed Counter-Current ChromatographyNaphthopyranone GlycosidesAntioxidantsBrazilChromatography, High Pressure LiquidChromatography, Thin LayerCountercurrent DistributionEriocaulaceaeEthanolFree RadicalsGlycosidesHeterocyclic Compounds, 3-RingNaphthalenesPlant ExtractsPyronesPaepalanthusArtigoWOS:000181126300018Acesso aberto2-s2.0-00368753432-s2.0-0036875343.pdf0000-0003-3032-2556