TRITERPENOID SAPONINS FROM GYPSOPHILA-OLDHAMIANA

Three new triterpenoid saponins were isolated from the roots of Gypsop hila oldhamiana. Their structures were elucidated, using a combination of homonuclear and heteronuclear 2D nmr and fabms, as 3-O-beta-D-gala ctopyranosyl-(1 --> 2)-[beta-D-xylopyranosyl-(1 --> 3)]-beta-D-glucuro nopyranosyl quillaic acid methyl ester [1], 3-O-beta-D-galactopyranosy l-(1 --> 2)-[beta-D-xylopyranosyl-(1 --> 3)]-beta-D-glucuronopyranosyl gypsogenin methyl ester [2], adn 3-O-beta-D-galactopyranosyl-(1 --> 2 )-[beta-D-xylopyranosyl-(1 --> 3)]-beta-D-glucuronopyranosyl quillaic acid 28-[O-beta-D-fucopyranosyl(1 --> 4)-beta-D-glucopyranosyl(1 --> 3 )]-alpha-L-rhamnopyranosyl) ester [3].