Abstract
Two new triterpenoid saponins, named cernuaside C and D, have been isolated from Pulsatilla cernua (Thunb.) Bercht. et Opiz. The structures of the two new triterpenoid saponins were elucidated as 3-O-β-D-xylopyranosyl(1 → 2)-[α-L-rhamnopyranosyl(1 → 3)]-α-L-arabinopyranosyl oleanolic acid 28-α-L–rhamnopyranosyl(1 → 4)-β-D-glucopyranosyl(1 → 6)-β-D-glucopyranoside. (1) and 3-O-α-L–arabinopyranosyl (1 → 3)-α-L-rhamnopyranosyl(1 → 2)-α-L-arabinopyranosyl oleanolic acid 28–O–β-D-glucopyranoside (2) by 1D, 2D-NMR techniques, ESI-MS analysis as well as chemical methods.
Acknowledgements
The authors are grateful to Supported by Program for Changjiang Scholars and Innovative Research Team in University, IRT0413 and China International Science and Technology Cooperation programme (2006DFA31230).