New antioxidant C-glucosylxanthones from the stems of Arrabidaea samydoides
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
01/10/2003
|
Resumo |
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. |
Formato |
1384-1387 |
Identificador |
http://dx.doi.org/10.1021/np030100t Journal of Natural Products. Washington: Amer Chemical Soc, v. 66, n. 10, p. 1384-1387, 2003. 0163-3864 http://hdl.handle.net/11449/37138 10.1021/np030100t WOS:000186237800018 |
Idioma(s) |
eng |
Publicador |
Amer Chemical Soc |
Relação |
Journal of Natural Products |
Direitos |
closedAccess |
Tipo |
info:eu-repo/semantics/article |