Phenolic antioxidants from the whole plant of Phyllanthus urinaria
Xu, Min; Zha, Zhong-Jun; Qin, Xue-Ling; Zhang, Xiang-Lan; Yang, Chong-Ren; Zhang, Ying-Jun
AbstractThe 1.1-diphenyl-2-picryclydrazyl (DPPH) assay on the extract of Phyllanthus urinaria L. (Euphorbiaceae) displayed Considerable radical-scavenging activity (SC50=14.3 mu g/ml). Further bioassay-guided purification of the extract led to the isolation of a series of 15 phenolic compounds, including the ellagitannins 1-7, the flavonoids 8-10, and the simple hydroxylated (or glycosylated) aromatic acids 11-15. Their structures were identified by spectroscopic analyses and comparison with authentic samples or literature data. The structure of repandinin B (1) was for the first time fully assigned by 1D- and 2D-NMR experiments. The phenolic compounds 1, 3,4, 6,9, 11, and 15 have not been isolated before from the title plant. The antioxidant activities and mushroom-tyrosinase-inhibitory activities of all compounds were determined by DPPH-radical-scavenging and mushroom-tyrosinase-inhibitory assays (Table 2).
KeywordPunica-granatum Emblica Tannins Constituents Leaves Roots Ellagitannins Acid
Subject AreaBiochemistry & Molecular Biology ; Chemistry ; Multidisciplinary
Indexed BySCI
WOS Research AreaBiochemistry & Molecular Biology ; Chemistry
WOS SubjectBiochemistry & Molecular Biology ; Chemistry, Multidisciplinary
WOS IDWOS:000249863500021
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Cited Times:22[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Kunming Inst Bot, State Key Lab Phytochem & Plant Resources W China, Kunming 650204, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
Recommended Citation
GB/T 7714
Xu, Min,Zha, Zhong-Jun,Qin, Xue-Ling,et al. Phenolic antioxidants from the whole plant of Phyllanthus urinaria[J]. CHEMISTRY & BIODIVERSITY,2007,4(9):2246-2252.
APA Xu, Min,Zha, Zhong-Jun,Qin, Xue-Ling,Zhang, Xiang-Lan,Yang, Chong-Ren,&Zhang, Ying-Jun.(2007).Phenolic antioxidants from the whole plant of Phyllanthus urinaria.CHEMISTRY & BIODIVERSITY,4(9),2246-2252.
MLA Xu, Min,et al."Phenolic antioxidants from the whole plant of Phyllanthus urinaria".CHEMISTRY & BIODIVERSITY 4.9(2007):2246-2252.
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