An isoflavan and saponins from Astragalus depressus L.

Abstract

In this study, nine known secondary metabolites were isolated from ethyl acetate and n-butanol extracts of Astragalus depressus L. (Fabaceae family), including one isoflavan, namely pendulone (1) and eight saponins, namely cyclogaleginoside A (2), astrasieversianin II (3), astrasieversianin IV (4), astrasieversianin VII (5), astrasieversianin VI (6), astrasieversianin XIV (7), dehydrosoyasaponin I (8) and soyasaponin I (9). The structures of compounds 1-9 were elucidated by using spectroscopic methods, including 1D and 2D NMR, ESI mass spectrometry and comparison with literature data.

Keywords

• fabaceae
• Astragalus depressus
• saponins
• pendulone
• NMR
• ESI