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题名: Puerins A and B, two new 8-C substituted flavan-3-ols from Pu-er tea
作者: Zhou, ZH; null(张颖君); Xu, M; Yang, CR
刊名: JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
关键词: Pu-er tea ; Camellia sinensis var. assamica ; phenolic compounds
英文摘要: Pu-er tea is a special treated fermented tea produced from crude green tea, which is prepared from the leaves of Camellia sinensis var. assamica. It is a traditional beverage having been used in China, particularly the southern areas, for a long time. Chemical investigation led to the identification of two new 8-C substituted flavan-3-ols, puerins A (1) and B (2), and two known cinchonain-type phenols, epicatechin-[7,8-bc]-4 alpha-(4-hydroxyphenyl)-dihydro-2(3"-pyranone (3) and cinchonain lb (4), together with other seven known phenolic compounds, 2,2',6,6'-tetrahydroxydiphenyl (5), (-)-epicatechin-8C-beta-D-glucopyranoside (6), (-)-epicatechin (EC) (7), (-)-epigallocatechin (EGC) (8), (+/-)-gallocatechin (GC) (9), gallic acid (10), and myricetin (11), in addition to caffeine (12). Their structures were determined by spectroscopic methods. The compounds 1-5, which might be formed in the postfermentative process of Pu-er tea, were isolated from tea and theaceous plants for the first time.
出版日期: 2005-11-02
卷号: 53, 期号:22, 页码:8614-8617
语种: 英语
收录类别: SCI ; IC
学科分类: Agriculture, Multidisciplinary; Chemistry, Applied; Food Science & Technology
ISSN号: 0021-8561
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/4684
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

Recommended Citation:
Zhou, ZH; Zhang, YJ; Xu, M; Yang, CR.Puerins A and B, two new 8-C substituted flavan-3-ols from Pu-er tea,JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY,2005,53(22):8614-8617
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