Abstract
The isolation of seven triterpenoid saponins (1−7) is reported, among them three new natural products (1−3), together with three new ionol-derived glycosides (8−10) from the MeOH extract of the leaves of Amaranthus caudatus (Amaranthaceae). All structures were elucidated by spectroscopic methods, including the concerted application of one-dimensional (1H, TOCSY, 13C, and 13C DEPT NMR) and two-dimensional NMR techniques (DQF−COSY, HSQC, HMBC, ROESY). A comparative study of seeds and leaves has been also carried out. Keywords: Amaranthus caudatus; Amaranthaceae; leaves; food source; triterpenoid saponins; ionol glycosides; 1H and 13C NMR analysis
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