title: Triterpenoid saponins from Maesa lanceolata.
abstract: Six new homologous triterpenoid saponins were isolated from the methanol extract of the leaves of Maesa lanceolata and characterized as 3 beta-O-[alpha-L-rhamnopyranosyl(1 --> 2)-beta-D-galactopyranosyl (1 --> 3)]-[beta-D-galactopyranosyl(1 --> 2)]-beta-D-glucuronopyranosides alpha-diol, 22 alpha-angeloyloxy-16 alpha-butanoyloxy-13 beta,28-oxydoolean-21 beta,28 alpha-diol, 16 alpha,22 alpha-diangeloyloxy-13 beta,28-oxydoolean-21 beta,-28 alpha-diol, 22 alpha-angeloyloxy-13 beta,28-oxydo-16 alpha-(2-methyl-butanoyloxy)-olean-21 beta,28 alpha-diol, 21 beta-acetoxy-22 alpha-angeloyloxy-13 beta,28-oxydo-16 alpha-propanoyloxyolean-28 alpha-ol, 21 beta-acetoxy-22 alpha-angeloyloxy-16 alpha-butanoyloxy-13 beta,28-oxydoolean-28 alpha-01. The structures were established on the basis of chemical and spectral evidence.
authors.affiliation: Department of Pharmaceutical Sciences, University of Antwerp, Belgium.
authors.forename: J B
authors.initials: JB
authors.lastname: Sindambiwe
authors.forename: A M
authors.initials: AM
authors.lastname: Baldé
authors.forename: T
authors.initials: T
authors.lastname: De Bruyne
authors.forename: L
authors.initials: L
authors.lastname: Pieters
authors.forename: H
authors.initials: H
authors.lastname: Van den Heuvel
authors.forename: M
authors.initials: M
authors.lastname: Claeys
authors.forename: D A
authors.initials: DA
authors.lastname: Van den Berghe
authors.forename: A J
authors.initials: AJ
authors.lastname: Vlietinck
mesh_terms: D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D015394:Molecular Structure; D010936:Plant Extracts; D018515:Plant Leaves; D010946:Plants, Medicinal; D012432:Rwanda; D012503:Saponins / Q000737:chemistry* / Q000302:isolation & purification; D016339:Spectrometry, Mass, Fast Atom Bombardment; D014197:Trees; D014315:Triterpenes / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D010936:Plant Extracts; D012503:Saponins; D014315:Triterpenes