银合欢树胶及其降解产物的化学和¹³C核磁共振研究。

Chemical and 13C NMR studies of Enterolobium cyclocarpum gum and its degradation products.

作者信息

León de Pinto G, Martinez M, Ludovic de Corredor A, Rivas C, Ocando E

机构信息

Centro de Investigaciones en Quimica de los Productos Naturales, Facultad de Humanidades y Educacion, Universidad del Zulia, Maracaibo, Venezuela.

出版信息

Phytochemistry. 1994 Nov;37(5):1311-5. doi: 10.1016/s0031-9422(00)90404-7.

DOI:10.1016/s0031-9422(00)90404-7

PMID:7765755

Abstract

A structural study of the gum exudate from Enterolobium cyclocarpum has been carried out using chemical methods and 13C NMR spectroscopy. The results reveal that the structure of this gum is essentially a beta-(1-->3)-galactan. Some galactoses are 6-O-linked and others also occur as terminal residues. There is evidence that supports the presence of alpha-L-arabinofuranose and beta-L-arabinopyranose. beta-D-Glucuronic acid may be present as terminal and internal residues, while the 4-O-methyl-alpha-D-glucuronic acid residues exist predominantly in internal positions.

摘要

已采用化学方法和13C核磁共振光谱法对象耳豆树胶渗出物进行了结构研究。结果表明，这种树胶的结构本质上是一种β-(1→3)-半乳聚糖。一些半乳糖以6-O-连接的形式存在，其他半乳糖也以末端残基的形式出现。有证据支持α-L-阿拉伯呋喃糖和β-L-阿拉伯吡喃糖的存在。β-D-葡萄糖醛酸可能以末端和内部残基的形式存在，而4-O-甲基-α-D-葡萄糖醛酸残基主要存在于内部位置。