An arabinogalactan isolated from the medicinal plant Maytenus ilicifolia

被引：30

作者：

Cipriani, TR ^{[1
]}

Mellinger, CG ^{[1
]}

Gorin, PAJ ^{[1
]}

Iacomini, M ^{[1
]}

机构：

[1] Univ Fed Parana, Dept Bioquim & Biol Mol, BR-81531990 Curitiba, Parana, Brazil

来源：

JOURNAL OF NATURAL PRODUCTS | 2004年 / 67卷 / 04期

关键词：

D O I：

10.1021/np034043f

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

An arabinogalactan was obtained from the leaves of Maytenus ilicifolia by hot aqueous 2% KOH extraction, followed by a freezing-thawing process and anion-exchange chromatography. It consisted of arabinose, galactose, galacturonic acid, and rhamnose in a 69:20:6:5 molar ratio. Methylation analysis, partial acid hydrolysis, and C-13 NMR spectroscopy indicated that it was an arabinogalactan containing a (1-->4)linked beta-Galp main chain, substituted at O-6 with Ara units, which were in turn substituted at O-5 (Araf) and/or O-4 (Arap), O-3, O-3,5, and O-2,5. This arabinogalactan is probably linked to O-4 of some Rhap units of a type I rhamnogalacturonan, formed by repeating (1-->4)-alpha-D-GalpA-(1-->2)-alpha-L-Rhap groups.

引用

页码：703 / 706

页数：4