The chemical constituents from Anemone rivularis

Eight compounds were isolated from the methanol extract of the roots and ae rial parts of Anemone rivularis Buch. -Ham. ex DC. By means of spectroscopi c methods, their structures were established as oleanolic acid 3-O-alpha -L -arabinopyranoside(1), oleanolic acid 3-O-alpha -L-rhamnopyranosyl(1 -->2)- alpha -arabinopyranoside(2), oleanolic acid 3-O-alpha -D-ribopyranosyl(1 -- >3)-alpha -L-rhamnopyranosyl(1-2)-alpha -L-arabinopyranoside(3), hederagini n 3-O-alpha -L-arabinopyranoside(4), 3-O-alpha -D-ribopyranosyl(1 -->3)-alp ha -L-rhamnopyranosyl(1-2)-alpha -L-arabinopyranosly oleanolic acid 28-O-al pha -L-rhamnopyranosyl(1 -->4)-O-D-glucopyranosyl(1-6)-beta -D-gulcopyranos ide(5), 3-O-alpha -L-ribopyranosyl(1-3)-alpha -L-rhamnopyranosyl(1 -->4)-al pha -L-arabinopyranosly hederaginin 28-O-alpha -L-rhamnopyranosyl(1 -->4)-a lpha -D-glucopyranosyl(1-6)-beta -Dgulcopyranoside(6), 3 beta ,12 beta ,23- trihydroxy-olean-28,13 beta -olide(7) and 3 beta ,12 beta ,13 beta -trihydr oxy-olean-28-oic acid 3-O-D-ribopyranosyl(1 -->3)-alpha -L-rhamnopyranosyl( 1 -->2)-alpha -L-arabinopyranoside (8) respectively. The last two compounds were new ones and named anemonolide(7) and anemoside B(8).