title: A triterpenoid saponin from Maesa ramentacea.
abstract: The structure of a piscicidal triterpenoid saponin (saponin A) isolated from the leaves of Maesa ramentacea has been shown to be 3-O-[[(alpha-rhamnopyranosyl (1-->2)-alpha-L-rhamnopyranosyl(1-->2)-beta-D-galactopyranosyl (1-->3)]-[beta-D-glucopyranosyl(1-->2)]-beta-D-glucuronopyranosyl] barringtogenol C21, 22-O-diangeloate. Extensive use was made of homo- and heteronuclear 2D NMR techniques.
authors.affiliation: Department of Chemistry, Faculty of Science, Silpakorn University, Nakorn Pathom, Thailand.
authors.forename: P
authors.initials: P
authors.lastname: Tuntiwachwuttikul
authors.forename: O
authors.initials: O
authors.lastname: Pancharoen
authors.forename: W
authors.initials: W
authors.lastname: Mahabusarakam
authors.forename: P
authors.initials: P
authors.lastname: Wiriyachitra
authors.forename: W C
authors.initials: WC
authors.lastname: Taylor
authors.forename: W A
authors.initials: WA
authors.lastname: Bubb
authors.forename: G H
authors.initials: GH
authors.lastname: Towers
mesh_terms: D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D018515:Plant Leaves / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification
chemical_list: C104336:3-O-((rhamnopyranosyl(1-2)-rhamnopyranosyl(1-2)-galactopyranosyl(1-3))-glucopyranosyl(1-2)-glucuronopyranosyl)barringtogenol; D012503:Saponins; D014315:Triterpenes