Please use this identifier to cite or link to this item:
|標題:||Structural determination and DPPH radical-scavenging activity of two acylated flavonoid tetraglycosides in oolong tea (Camellia sinensis)||作者:||曾志正
|關鍵字:||Camellia sinensis;oolong tea;quercetin;kaempferol;1,1-diphenyl-2-pierylhydrazyl;green tea;phenolic-compounds;glycosides;tannins;identification;flavan-3-ols;constituents;elucidation;catechins;fruits||Project:||Chemical & Pharmaceutical Bulletin||期刊/報告no：:||Chemical & Pharmaceutical Bulletin, Volume 56, Issue 6, Page(s) 851-853.||摘要:||
Two major acylated flavonoid tetraglycosides were isolated from the methanol extract of oolong tea. Their structures were elucidated by spectroscopic methods as quercetin 3-O-[2(G)-(E)-coumaroyl-3G-O-beta-D-glucosyl-3R-O-beta-D-glucosylrutinoside] (1) and kaempferol 3-O-[2(G)-(E)-coumaroyl-3G-O-beta-D-glucosylrutinoside] (2). Compounds 1 and 2 exhibited scavenging activity against DPPH radical with EC(50) values of 30.5 and 487.2 mu M, respectively.
|Appears in Collections:||生物科技學研究所|
Show full item record
TAIR Related Article
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.