Studies on the Constituents of Amaranthus caudatus Leaves: Isolation and Structure Elucidation of New Triterpenoid Saponins and Ionol-Derived Glycosides

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• 作者：Luca Rastrelli ; Rita Aquino ; Susana Abdo ; Maria Proto ; Francesco De Simone ; and Nunziatina De Tommasi
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：1998
• 出版时间：May 1998
• 年：1998
• 卷：46
• 期：5
• 页码：1797 - 1804
• 全文大小：114K
• 年卷期：v.46,no.5(May 1998)
• ISSN：1520-5118

文摘

The isolation of seven triterpenoid saponins(1-7) is reported, among them threenew naturalproducts (1-3), together with threenew ionol-derived glycosides (8-10)from the MeOH extract ofthe leaves of Amaranthus caudatus(Amaranthaceae). All structures were elucidated byspectroscopicmethods, including the concerted application of one-dimensional(¹H, TOCSY, ¹³C, and ¹³CDEPTNMR) and two-dimensional NMR techniques (DQF-COSY, HSQC, HMBC,ROESY). A comparativestudy of seeds and leaves has been also carried out.Keywords: Amaranthus caudatus; Amaranthaceae; leaves; food source;triterpenoid saponins; ionolglycosides; ¹H and ¹³C NMRanalysis