Saponins in alfalfa (Medicago sativa L.) root and their structural elucidation

被引：76

作者：

Bialy, Z

Jurzysta, M

Oleszek, W

Piacente, S

Pizza, C

机构：

[1] Inst Soil Sci & Plant Cultivat, Dept Biochem, PL-24100 Pulawy, Poland

[2] Univ Salerno, Dipartimento Sci Farmaceut, I-84084 Salerno, Italy

来源：

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY | 1999年 / 47卷 / 08期

关键词：

medicago sativa; alfalfa; saponins; triterpenoid glycosides;

D O I：

10.1021/jf9901237

中图分类号：

S [农业科学];

学科分类号：

09 ;

摘要：

Twenty-four saponins have been identified in alfalfa roots, including 13 medicagenic acids, 2 zanhic acids, 4 hederagenins, 1 soyasapogenol A, 2 soyasapogenol B's, 1 soyasapogenol E, and 1 bayogenin glycoside. Ten of the identified compounds, including 3-O-[beta-D-glucopyranosyl(1-->3)-beta-D-glucopyranosyl]-28-O-beta-D-glucopyranoside medicagenate, 3-O-[alpha-L-rhamnopyranosyl(1-->2)-beta-D-glucopyranosyl-(1-->2)-beta-D-glucopyranoside] medicagenic acid, 3-O-[beta-D-glucopyranosyl(1-->2)-beta-D-glucopyranosyl(1-->2)-beta-D-glucopyranosyl]-28-beta- D-glucopyranoside medicagenate, 3-O-[beta-D-glucuronopyranosyl methyl eater]-28-O-[beta-D-xylopyranosyl(1-->4)-alpha-L-rhamnopyranosyl(1-->2)-alpha-L-arabinopyranoside] medicagenate, 3-O-[alpha-L-rhamnopyranosyl(1-->2)-beta-D-galactopyranosyl(1-->2)-beta-D-glucuronopyranosyl]-21-O-alpha-L-rhamnopyranoside soyasapogenol A, 3-O-[beta-D-glucopyranosyl(1-->2)-beta-D-glucopyranosyl (1-->2)glucopyranosyl] -28-O-[beta-D-xylopyranosyl(1-->4)-alpha-L-rhamnopyranosyl(1-->2)-alpha-L-arabinopyranoside] medicagenate, 3-O-[beta-D-glucopyranosyl( 1-->2)-beta-D-glucopyranosyl(1-->2)glucopyranosyl]-28-O-[beta-D-xylopyranosyl(1-->4)-)-[beta-D-apiofuranosyl-(1-->3)]-alpha-L-rhamnopyranosyl(1-->2)-alpha-L-arabinopyranoside) medicagenate, 3-O-[beta-D-glucopyranosyl(1-->2)-beta-D-glucopyranosyl(1-->2)-beta-D-glucopyranosyl]-28-O-[beta-D-xylopyranosyl (1-->4)-alpha-L-rhamnopyranosyl(1-->2)-alpha-L-arabinopyranoside] zanhic acid, 3-O-[beta-D-glucopyranosyl(1-->2)-beta-D-glucopyranosyl(1-->2)-beta-D-glucopyranosyl]-28-O-{beta-D-xylopyranosyl(1-->4)-[beta-D-apiofuranoside-(1-->3)]-alpha-L-rhamnopyranosyl(1-->2)-alpha-L-arabinopyranoside}zanhic acid, and 3-O-[beta-D-galactopyranosyl(1-->2)-beta-D-glucuronopyranosyl]-28-O-beta-D-glucopyranoside bayogenin, were not reported before, and their structures were established by spectral (FAB-MS and NMR) techniques. In addition, 3-O-[alpha-L-rhamnopyranosyl(1-->2)-beta-D-galactopyranosyl(1-->2)-beta-D-glucuronopyranoside] soyasapogenol E was identified in the roots for the first time.

引用

页码：3185 / 3192

页数：8

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