Insights into chemical constituents of Amaranthus spinosus L. (Amaranthaceae)

Abstract

Seven compounds, including two diglycoside flavonoids hesperidin (1) and rutin (2), one phenolic acid (E)-ferulic acid (3), two amino acids namely tyrosine (4) and arginine (5) and two sterols comprising spinasterol (6) and spinasterol 3-O-β-D-glucopyranoside (7) were isolated from the whole plant of Amaranthus spinosus L., Amaranthaceae collected at Bu Dang district, Binh Phuoc province, Vietnam. Their chemical structures were elucidated by spectroscopic methods including ESI-MS, 1D and 2D-NMR and compared with published data. All these compounds were known to be presented for the first time in this plant. Among them, three compounds 1, 6 and 7 were isolated from Amaranthus genus for the first time.