title: Triterpenoid saponins from Quillaja saponaria.
abstract: Three new saponins were isolated from a commercial bark extract of Quillaja saponaria Molina. These compounds were also obtained as degradation products from larger saponins in this extract when treated with strong alkali. The compounds were characterized, using mainly NMR spectroscopy, mass spectrometry and chemical methods, as quillaic acid 3-O-¿beta-D-galactopyranosyl-(1-->2)-beta-D-glucopyranosiduronic acid¿, 3-O-¿alpha-L-rhamnopyranosyl-(1-->3)-[beta-D-galactopyranosyl-(1-->2)] -beta-D-glucopyranosiduronic acid¿ and 3-O-¿beta-D-xylopyranosyl-(1-->3)-[beta-D-galactopyranosyl -(1-->2)]-beta-D-glucopyranosiduronic acid¿, respectively.
authors.affiliation: Department of Chemistry, Swedish University of Agricultural Sciences, Uppsala, Sweden.
authors.forename: S
authors.initials: S
authors.lastname: Guo
authors.forename: L
authors.initials: L
authors.lastname: Kenne
authors.forename: L N
authors.initials: LN
authors.lastname: Lundgren
authors.forename: B
authors.initials: B
authors.lastname: Rönnberg
authors.forename: B G
authors.initials: BG
authors.lastname: Sundquist
mesh_terms: D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D009828:Oleanolic Acid / Q000031:analogs & derivatives*; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D014197:Trees / Q000737:chemistry*
chemical_list: D012503:Saponins; C112824:quillaic acid 3-O-galactopyranosyl-1-2-glucopyranosiduronic acid; C112825:quillaic acid 3-O-rhamnopyranosyl-1-3-(galactopyranosyl-1-2)glucopyranosiduronic acid; C112826:quillaic acid 3-O-xylopyranosyl-1-3-(galactopyranosyl-1-2)glucopyranosiduronic acid; D009828:Oleanolic Acid