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题名: Phenolic antioxidants from the whole plant of Phyllanthus urinaria
作者: Xu, Min; Zha, Zhong-Jun; Qin, Xue-Ling; Zhang, Xiang-Lan; Yang, Chong-Ren; null(张颖君)
刊名: CHEMISTRY & BIODIVERSITY
关键词: PUNICA-GRANATUM ; EMBLICA ; TANNINS ; CONSTITUENTS ; LEAVES ; ROOTS ; ELLAGITANNINS ; ACID
英文摘要: The 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).
出版日期: 2007
卷号: 4, 期号:9, 页码:2246-2252
语种: 英语
收录类别: SCI
学科分类: Biochemistry & Molecular Biology; Chemistry; Multidisciplinary
ISSN号: 1612-1872
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/1985
Appears in Collections:植物化学与西部植物资源持续利用国家重点实验室_期刊论文

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作者单位: 1.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:
Xu, M; Zha, ZJ; Qin, XL; Zhang, XL; Yang, CR; Zhang, YJ.Phenolic antioxidants from the whole plant of Phyllanthus urinaria,CHEMISTRY & BIODIVERSITY,2007,4(9):2246-2252
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