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Position: Home > Articles > Isolation and Identification of a New Flavonoid from Tea(Camellia sinensis) Seeds and Its Antioxidant Activity FOOD SCIENCE 2013,34 (21) 115-120

一种新型茶叶籽黄酮单体的分离鉴定及其抗氧化活性

作  者:
侯留鑫;王华清;郑铁松;吕丽爽
单  位:
南京师范大学金陵女子学院食品科学与营养系
关键词:
茶叶籽;黄酮;鉴定;抗氧化
摘  要:
采用大孔吸附树脂HPD826、ODS柱和Sephadex LH-20分离纯化得到高纯度的茶叶籽黄酮单体化合物Ⅰ,通过紫外(UV)、红外(IR)、质谱(MS)、核磁共振(NMR)等方法鉴定其分子结构为柚皮素-7-O-(β-D-吡喃木糖基(1→6))(β-D-葡萄糖基(1→3)-α-L-鼠李糖基(1→2))-β-D-葡萄糖苷。对化合物Ⅰ及其同系物柚皮素和柚皮苷的抗氧化活性进行对比研究。结果表明:化合物Ⅰ在体外有一定的抗氧化能力,3种物质的抗氧化活性关系为柚皮素>柚皮苷>化合物Ⅰ,即黄酮苷元的抗氧化活性大于黄酮糖苷,黄酮二糖苷的抗氧化活性大于黄酮四糖苷。
译  名:
Isolation and Identification of a New Flavonoid from Tea(Camellia sinensis) Seeds and Its Antioxidant Activity
作  者:
HOU Liu-xin;WANG Hua-qing;ZHENG Tie-song;LüLi-shuang;Department of Food Science and Nutrition,Ginling College,Nanjing Normal University;
关键词:
tea seed;;flavonoids;;identification;;antioxidant activity
摘  要:
Using HPD826 resin,ODS and Sephadex LH-20 column chromatographies,compound Ⅰ,a flavanone glycoside was obtained from the crude extract of tea seeds rich in flavonoids.The structure of compound Ⅰ was identified by UV,IR,NMR and LC-MS as naringenin-7O-[ β D-xylopyranosyl(1→6)][ β D-glucopyranosyl(1→3)α L rhamnopyranosyl(1→2)]β D-glucopyranoside.The antioxidant activity in vitro was measured,and compared with reference standards of naringenin and naringin.Results showed that the antioxidant activity in vitro of these three materials followed the order: naringenin>naringin>compound Ⅰ,suggesting that the antioxidant activity of the aglycon flavanone was higher than that of the flavanone glycosides,and the antioxidant activity of diglycoside flavanone was higher than that of flavanone with four glycosyl moieties.Therefore,the glycosyl moieties in flavanones can reduce antioxidant activity.

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