Chemical composition of shallot (Allium ascalonicum Hort)

被引：100

作者：

Fattorusso, E

Iorizzi, M

Lanzotti, V

Taglialatela-Scafati, O

机构：

[1] Univ Molise, Dipartimento Sci & Tecnol Agroalimentari Ambienta, I-86100 Campobasso, Italy

[2] Univ Naples Federico II, Dipartimento Chim Sostanze Nat, I-80131 Naples, Italy

来源：

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY | 2002年 / 50卷 / 20期

关键词：

shallot; Allium ascalonicum Hort; Liliaceae; furostanol saponins; flavonol glycosides; NMR spectroscopy;

D O I：

10.1021/jf020396t

中图分类号：

S [农业科学];

学科分类号：

09 ;

摘要：

An extensive phytochemical analysis of the polar extracts from bulbs of shallot Allium ascalonicum Hort led to the isolation of two new furostanol saponins named ascalonicoside A1/A2 (1a/1b) and ascalonicoside B (4) respectively along with compounds 2a and 2b, most likely extraction artifacts On the basis of 2D NMR and mass spectrometry data the structures of the novel compounds were elucidated as furost 5(6) en 3beta 22alpha diol 1beta O-beta galactopyranosyl 26 O-[alpha L rhamnopyranosyl (1-->2) O beta D glucopyranoside] (1a), its epimer at position 22 (11 b) and furost 5(6),20(22) dien 3beta ol 1beta O beta D galactopyranosyl 26 O-[alpha L rhamnopyranosyl (1-->2) O beta glucopyranoside] (4) This is the first report of furostanol saponins in A ascalonicum High concentrations of quercetin isorhamnetin and their glycosides were also isolated and described.

引用

页码：5686 / 5690

页数：5

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