| Full text | |
| 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 Opportunities: | BIOTA-FAPESP Program - Thematic Grants |