Puerins A and B, two new 8-C substituted flavan-3-ols from Pu-er tea

doi:10.1021/jf051390h

	Puerins A and B, two new 8-C substituted flavan-3-ols from Pu-er tea
	Zhou, ZH; Zhang, YJ; Xu, M; Yang, CR
	2005-11-02
发表期刊	JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
ISSN	0021-8561
卷号	53 期号:22 页码:8614-8617
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.
关键词	Pu-er Tea Camellia Sinensis Var. Assamica Phenolic Compounds
学科领域	Agriculture, Multidisciplinary ; Chemistry, Applied ; Food Science & Technology
DOI	10.1021/jf051390h
收录类别	SCI ; IC
语种	英语
WOS记录号	WOS:000232909500030
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/4684
专题	植物化学与西部植物资源持续利用国家重点实验室
作者单位	Chinese Acad Sci, Kunming Inst Bot, State Key Lab Phytochem & Plant Resources W China, Kunming 650204, Peoples R China
推荐引用方式 GB/T 7714	Zhou, ZH,Zhang, YJ,Xu, M,et al. Puerins A and B, two new 8-C substituted flavan-3-ols from Pu-er tea[J]. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY,2005,53(22):8614-8617.
APA	Zhou, ZH,Zhang, YJ,Xu, M,&Yang, CR.(2005).Puerins A and B, two new 8-C substituted flavan-3-ols from Pu-er tea.JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY,53(22),8614-8617.
MLA	Zhou, ZH,et al."Puerins A and B, two new 8-C substituted flavan-3-ols from Pu-er tea".JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 53.22(2005):8614-8617.

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