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题名: Rubusuaviins a-f, monomeric and oligomeric ellagitannins from chinese sweet tea and their alpha-amylase inhibitory activity
作者: Li, Haizhou; Tanaka, Takashi; null(张颖君); Yang, Chong-Ren; Kouno, Isao
刊名: CHEMICAL & PHARMACEUTICAL BULLETIN
关键词: rubus suavissimus ; Rosaceae ; ellagitannin ; amylase ; polyphenol ; tannin
英文摘要: 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.
出版日期: 2007-09-01
卷号: 55, 期号:9, 页码:1325-1331
语种: 英语
ISSN号: 0009-2363
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内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/2955
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.Nagasaki Univ, Grad Sch Biomed Sci, Nagasaki 8528521, Japan
2.Chinese Acad Sci, Kunming Inst Bot, Lab Phytochem, Kunming 650204, Peoples R China

Recommended Citation:
Li, H; Tanaka, T; Zhang, YJ; Yang, CR; Kouno, I.Rubusuaviins a-f, monomeric and oligomeric ellagitannins from chinese sweet tea and their alpha-amylase inhibitory activity,CHEMICAL & PHARMACEUTICAL BULLETIN,2007,55(9):1325-1331
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