27-Hydroxyoleanolic Acid Type Triterpenoid Saponins from Anemone raddeana rhizome

Two new 27-hydroxyoleanolic acid type triterpenoid saponins were isolated from the rhizomes of Anemone raddeana Regel. The structures of the two compounds were elucidated as 27-hydroxyoleanolic acid 3-O-β-D-glucopyranosyl (1→2)-α-L-arabinopyranoside (1) and 3-O-α-L-rhamnopyranosyl (1→2)[β-D-glucopyranosyl (1→4)]-α-L-arabinopyranosyl-27-hydroxyoleanolic acid 28-O-α-L-rhamnopyranosyl (1→4)-β-D-glucopyranosyl (1→6)-β-D-glucopyranoside (2) on the basis of chemical and spectral evidence.