Saponins from Albizzia lucida.

Three main saponins were isolated from the seeds of Albizzia lucida. Their structures were established by spectral analyses and chemical and enzymatic transformations as 3-O-β- -xylopyranosyl(1→2)-- -arabinopyranosyl (1→6)] β- -glucopyranosyl (1→2)] β- -glucopyranosyl echinocystic acid; 3-O-- -arabinopyranosyl (1→6)]β- -glucopyranosyl (1→2)]-β- -glucopyranosyl echinocystic acid and 3-O-β- -xylopyranosyl (1→2)-β- -fucopyranosyl (1→6)-2-acetamido-2-deoxy-β- -glucopyranosyl echinocystic acid, characterized as its methyl ester.