title: Medicagenic acid saponins from Aster batangensis.
abstract: Two new medicagenic acid saponins, named asterbatanoside J and K, were isolated from the roots of Aster batangensis. On the basis of chemical and spectral studies especially 2D NMR including COSY, HETCOR, HMQC, HOHAHA, TOCSY, ROESY and HMBC techniques, their structures were established as 3-O-beta-D-glucopyranosyl-(1--> 6)-beta-D-glucopyranosyl-2 beta, 3 beta-dihydroxy-olean-12-en-23 alpha, 28-dioic acid- 28-O-alpha-L-arabinopyranosyl-(1-->3)-alpha-L- rhamnopyranosyl-(1-->2)-beta-D-fucopyranoside and 3-O-beta-D-glucopyranosyl-(1-->6)-beta-D-glucopyranosyl- medicagenic acid-28-O-beta-D-xylopyranosyl-(-->4)-[alpha-L- arabinopyranosyl-(1 -->3)-alpha-L-rhamnopyranosyl-(1-->2) -beta-D-fucopyranside, respectively.
authors.affiliation: Shanghai Institute of Materia Medica, Academia Sinica, P.R. China.
authors.forename: Y
authors.initials: Y
authors.lastname: Shao
authors.forename: B
authors.initials: B
authors.lastname: Zhou
authors.forename: K
authors.initials: K
authors.lastname: Ma
authors.forename: H
authors.initials: H
authors.lastname: Wu
authors.forename: L
authors.initials: L
authors.lastname: Lin
authors.forename: G A
authors.initials: GA
authors.lastname: Cordell
mesh_terms: D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D009828:Oleanolic Acid / Q000031:analogs & derivatives*; D018517:Plant Roots / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D016339:Spectrometry, Mass, Fast Atom Bombardment; D014315:Triterpenes
chemical_list: D012503:Saponins; D014315:Triterpenes; C094958:asterbatanoside J; C094959:asterbatanoside K; D009828:Oleanolic Acid; C005982:medicagenic acid