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Type: Artigo de periódico
Title: New antioxidant C-glucosylxanthones from the stems of Arrabidaea samydoides
Author: Pauletti, PM
Castro-Gamboa, I
Silva, DHS
Young, MCM
Tomazela, DM
Eberlin, MN
Bolzani, VD
Abstract: Three new C-glucosylxanthones, 2-(2'-O-trans-caffeoyl)-C-beta-D-glucopyranosyl-1,3,6,7-tetrahydroxyxanthone (1), 2-(2'-O-trans-cinnamoyl)-C-beta-D-glucopyranosyl-1,3,6,7-tetrahydroxyxanthone (2), and 2-(2'-O-trans-coumaroyl)-C-beta-D-glucopyranosyl-1,3,6,7-tetrahydroxyxanthone (3), were isolated from the stems of Arrabidaea samydoides, in addition to three known C-glucosylxanthones, mangiferin (4), 2-(2'-O-benzoyl)-C-beta-D-glucopyranosyl-1,3,6,7-tetrahydroxyxanthone (5), and muraxanthone (6). Their chemical structures were assigned on the basis of MS and 1D and 2D NMR experiments. Xanthones 1-6 showed moderate free radical scavenging activity against 1,1-diphenyl-2-picrylhydrazyl (DPPH) as well as antioxidant activity evidenced by redox properties measured on ElCD-HPLC.
Country: EUA
Editor: Amer Chemical Soc
Citation: Journal Of Natural Products. Amer Chemical Soc, v. 66, n. 10, n. 1384, n. 1387, 2003.
Rights: fechado
Identifier DOI: 10.1021/np030100t
Date Issue: 2003
Appears in Collections:Unicamp - Artigos e Outros Documentos

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