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(Reference retrieved automatically from Google Scholar through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Antioxidant flavan-3-ols and flavonol glycosides from Maytenus aquifolium

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Author(s):
Corsino‚ J. ; Silva‚ D. H. S. ; Zanoni‚ M. V. B. ; Bolzani‚ V. S. ; França‚ S. C. ; Pereira‚ A. M. S. ; Furlan‚ M.
Total Authors: 7
Document type: Journal article
Source: Phytotherapy Research; v. 17, n. 8, p. 913-916, 2003.
Field of knowledge: Physical Sciences and Mathematics - Chemistry
Abstract

TLC autographic assay revealed, in the EtOAc extract obtained from leaves and root bark of Maytenus aquifolium (Celastraceae), the presence of five compounds exhibiting antioxidant properties towards β-carotene. They were isolated and identified as epigallocatechin (1), (+) ouratea-catechin (2), proanthocyanidin (3), kaempferol 3-O-α-L-rhamnopyranosyl (1[RIGHTWARDS ARROW]6)-O-[β-D-glucopyranosyl (1[RIGHTWARDS ARROW]3)-O-α-L-rhamnopyranosyl-(1[RIGHTWARDS ARROW]2)]-O-β-D-glucopyranosyl (4) and quercetin 3-O-α-L-rhamnopyranosyl (1[RIGHTWARDS ARROW]6)-O-[β-D-glucopyranosyl (1[RIGHTWARDS ARROW]3)-O-α-L-rhamnopyranosyl-(1[RIGHTWARDS ARROW]2)]-O-β-D-glucopyranosyl (5). The isolates were investigated for their redox properties using cyclic voltammetry and for their radical scavenging abilities through spectrophotometric assay on the reduction of 2,2-diphenyl-pycryl hydrazyl (DPPH). These results were correlated to the inhibition of β-carotene bleaching on TLC autographic assay and to structural features of the flavonoids. Copyright © 2003 John Wiley & Sons, Ltd. (AU)

FAPESP's process: 98/05074-0 - Conservation and sustainable use of the plant biodiversity from the Cerrado and the Atlantic Forest: chemical diversity and prospecting for potential drugs
Grantee:Vanderlan da Silva Bolzani
Support type: BIOTA-FAPESP Program - Thematic Grants