Chemical constituents of the buds of Aralia elata (Miq.) Seem. (I)

Objective To study the chemical constituents of the extract (crude saponins) of the buds of Aralia elata (Miq.) Seem.Methods The chemical constituents were isolated by silica gel column chromatography and preparative HPLC,physical-chemical characters and the spectroscopic analysis were employed for the structural identification. Results Compound 1～5 were obtained and their structures were elucidated as congmuyenoside A (2),congmuyenoside B (2),congmunoside Ⅶ (3),3-O-β-D-glucopyranosyl (1→3)-α-L-arabinopyranosyl echinocystic acid (4),adenosine (5).Conclusions Compound 4 and 5 are isolated from Aralia elata for the first time.