Rubusuaviins a-f, monomeric and oligomeric ellagitannins from chinese sweet tea and their alpha-amylase inhibitory activity

	Rubusuaviins a-f, monomeric and oligomeric ellagitannins from chinese sweet tea and their alpha-amylase inhibitory activity
	Li, Haizhou ; Tanaka, Takashi ; Zhang, Ying-Jun; Yang, Chong-Ren ; Kouno, Isao
	2007-09-01
发表期刊	CHEMICAL & PHARMACEUTICAL BULLETIN
ISSN	0009-2363
卷号	55 期号:9 页码:1325-1331
摘要	Six new ellagitannins herein, rubusuaviins A-F, were isolated from the aqueous acetone extract of Chinese sweet tea (Tien-cha, dried leaves of Rubus suavissimus S. LEE) together with seven known tannins. Rubusuaviin A was characterized as 1-O-galloyl-2,3-O-(S)-HHDP-4,6-O-(S)-sanguisorboyl-beta-D-glucopyranose. Rubusuaviins B, C, and E are dimeric, trimeric, and tetrameric ellagitannins, respectively, in which the sanguisorboyl groups were connected ellagitannin units. Rubusuaviins D and F were desgalloyl derivatives of rubusuaviins C and E, respectively. The inhibition of a-amylase activity by rubusuaviins and related ellagitannins was compared. Ellagitannins with beta-galloyl groups at the glucose C-1 positions showed stronger inhibition compared with the alpha-galloyl and desgalloyl compounds. The molecular weight of these compounds was not important for the inhibition of a-amylase activity.
关键词	Rubus Suavissimus Rosaceae Ellagitannin Amylase Polyphenol Tannin
学科领域	Chemistry, Medicinal ; Chemistry, Multidisciplinary ; Pharmacology & Pharmacy
收录类别	SCI ; IC
语种	英语
WOS记录号	WOS:000250493800008
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/2955
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	1.Nagasaki Univ, Grad Sch Biomed Sci, Nagasaki 8528521, Japan 2.Chinese Acad Sci, Kunming Inst Bot, Lab Phytochem, Kunming 650204, Peoples R China
推荐引用方式 GB/T 7714	Li, Haizhou,Tanaka, Takashi,Zhang, Ying-Jun,et al. Rubusuaviins a-f, monomeric and oligomeric ellagitannins from chinese sweet tea and their alpha-amylase inhibitory activity[J]. CHEMICAL & PHARMACEUTICAL BULLETIN,2007,55(9):1325-1331.
APA	Li, Haizhou,Tanaka, Takashi,Zhang, Ying-Jun,Yang, Chong-Ren,&Kouno, Isao.(2007).Rubusuaviins a-f, monomeric and oligomeric ellagitannins from chinese sweet tea and their alpha-amylase inhibitory activity.CHEMICAL & PHARMACEUTICAL BULLETIN,55(9),1325-1331.
MLA	Li, Haizhou,et al."Rubusuaviins a-f, monomeric and oligomeric ellagitannins from chinese sweet tea and their alpha-amylase inhibitory activity".CHEMICAL & PHARMACEUTICAL BULLETIN 55.9(2007):1325-1331.

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