STEROID SAPONINS FROM SOLANUM-LAXUM

Two new steroid saponins, named laxumins A and B, were isolated from t he ethanolic extract of the aerial parts of Solanum laxum. These compo unds were characterized, using mainly NMR spectroscopy, mass spectrome try and chemical methods, as (23S,25S)-spirost-5-en-3 beta,15 alpha,23 -triol 3-O-{beta-D-glucopyranosyl-(1 --> 2)-beta-D-glucopyranosyl-(1 - -> 4)-[alpha-L-rhamnopyranosyl-(1 --> 2)]-beta-D-galactopyranoside} an d 3-O-{beta-D-glucopyranosyl-(1 --> 4)-alpha-L-rhamnopyranosyl-(1 --> 2)]-beta-D-galactopyranoside), respectively.