Saponins from Cephalaria aristata C. Koch

One new oleanane-type saponin, 3-O-β-D-glucopyranosyl-(1→4)-β-D-xylopyranosyl-(1→3)-α-L-rhamnopyranosyl-(1→2)-α-L-arabinopyranosyl hederagenin 28-O-β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyl ester (1) was isolated from the MeOH extract of whole plant parts of Cephalaria aristataC. Koch along with three known oleanane-type saponins (2-4), 3-O- α -L-rhamnopyranosyl-(1→2)- α -L-arabinopyranosyl hederagenin 28-O-( β -D-glucopyranosyl-(1→6)- β -D-glucopyranosyl) ester, 3-O- β -D-glucopyranosyl-(1→4)- β -D-xylopyranosyl-(1→3)- α -L-rhamnopyranosyl-(1→2)- α -L-arabinopyranosyl hederagenin and 3-O- α -L-rhamnopyranosyl-(1→2)- α -L-arabinopyranosyl hederagenin respectively, (5-7), oleanolic acid (5), β -amyrin (6) and 20 β -hydroxyursolic acid (7) and one sterol glucoside (8), 29-hydroxystigmast-5-en-3-O- β -D-glucopyranosyde. Their structures were established by the extensive use of 1D- and 2D-NMR experiments along with ESIMS and HRMS analysis.