Abstract
Four triterpenoid saponins (I-IV), isolated from the root of Pulsatilla cernua, were characterized as follows : I, hederagenin (hederag.) 3-O-α-L-rhamnopyranosyl (rham·pyr)-(1→2)-α-L-arabinopyranoside ; II, 3-O-α-L-rham·pyr (1→2)-α-L-arabinopyranosyl (ara·pyr)-hederag. 28-O-α-L-rham·pyr-(1→4)-β-D-glucopyranosyl (gluc·pyr)-(1→6)-β-D-glucopyranoside ; III, 3-O-α-L-rham·pyr-(1→2)-[β-D-gluc·pyr-(1→4)]-α-L-ara·pyr-hederag. 28-O-α-L-rham·pyr-(1→4)-β-D-gluc·pyr-(1→6)-β-D-glucopyranoside ; IV, hederag. 3-O-α-L-rham·pyr-(1→2)-[β-D-gluc·pyr-(1→4)]-α-L-arabinopyranoside. III and IV are new saponins. II and III were also detected in Pulsatilla koreana and P. chinensis on TLC.
