Studies on the constituents of a Brazilian folk infusion.: Isolation and structure elucidation of new triterpene saponins from Ilex amara leaves

被引：12

作者：

de Andrade, FDP

Piacente, S

Pizza, C

Vilegas, W

机构：

[1] Univ Estadual Paulista, Inst Quim Araraquara, BR-14801970 Araraquara, SP, Brazil

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

来源：

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY | 2002年 / 50卷 / 02期

关键词：

Ilex amara (Vellozo) Loes; Aquifollaceae; mate; Infusion; triterpene saponins; 1D and 2D NMR;

D O I：

10.1021/jf010863r

中图分类号：

S [农业科学];

学科分类号：

09 ;

摘要：

The isolation of three new triterpene saponins 3beta-O-beta-D-glucopyranosyl-(1-->3)-alpha-L-2-O-acetylara-binopyranosylolean-12-en-28-oic acid 28-O-beta-D-glucopyranosyl ester (2), 3beta-O-beta-D-glucopyranosyl-(1-->2)-alpha-L-O-arabinopyranosylurs-12-en-28-oic acid (3), and 3beta-O-beta-D-glucopyranosyl-(1-->2)-beta-D-O-galactopyranosylurs-12-en-28-oic acid (4) together with five known saponins and one flavonoid glycoside from the aqueous infusion of flex amara (Vellozo) Loes. leaves is reported. All structures were elucidated by spectroscopic methods, including the concerted application of one-dimensional (H-1, TOCSY, C-13, and C-13 DEPT NMR) and two-dimensional NMR techniques (DQF-COSY, HSQC, and HMBC).

引用

页码：255 / 261

页数：7

共 49 条

[1] The total reactive antioxidant potential (TRAP) and total antioxidant reactivity (TAR) of Ilex paraguayensis extracts and red wine [J].