title: Steroid saponins from Solanum laxum.
abstract: Two new steroid saponins, named laxumins A and B, were isolated from the ethanolic extract of the aerial parts of Solanum laxum. These compounds were characterized, using mainly NMR spectroscopy, mass spectrometry 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} and 3-O-{beta-D-glucopyranosyl-(1--> 4)-alpha-L-rhamnopyranosyl-(1-->2)]-beta-D-galactopyranoside}, respectively.
authors.affiliation: Cátedra de Farmacognosia y Productos Naturales, Facultad de Química, Montevideo, Uruguay.
authors.forename: F
authors.initials: F
authors.lastname: Ferreira
authors.forename: S
authors.initials: S
authors.lastname: Soulé
authors.forename: A
authors.initials: A
authors.lastname: Vazquez
authors.forename: P
authors.initials: P
authors.lastname: Moyna
authors.forename: L
authors.initials: L
authors.lastname: Kenne
mesh_terms: D002236:Carbohydrate Conformation; D009682:Magnetic Resonance Spectroscopy; D010944:Plants / Q000737:chemistry*; D016339:Spectrometry, Mass, Fast Atom Bombardment