title: A bidesmosidic hederagenin hexasaccharide from the roots of Symphytum officinale.
abstract: A new bidesmosidic triterpenoidal saponin 3-O-[beta-D-glucopyranosyl-(1-->4)-beta-D-glucopyranosyl-(1-->4)-alpha-L - arabinopyranosyl]-hederagenin-28-O-[alpha-L-rhamnopyranosyl- (1-->4)-beta-D- glucopyranosyl-(1-->6)-beta-D-glucopyranosyl] ester, was isolated from the roots of Symphytum officinale. The structure was assigned by chemical methods and spectral analysis (1H, 13C, DEPT, NMR, EI-MS and FAB-MS) including 1H-1H COSY, 1H-13C COSY and HOHAHA. The prosapogenin of this saponin is also a new compound.
authors.affiliation: H.E.J. Research Institute of Chemistry, University of Karachi, Pakistan.
authors.forename: F V
authors.initials: FV
authors.lastname: Mohammad
authors.forename: M
authors.initials: M
authors.lastname: Noorwala
authors.forename: V U
authors.initials: VU
authors.lastname: Ahmad
authors.forename: B
authors.initials: B
authors.lastname: Sener
mesh_terms: D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008969:Molecular Sequence Data; D009828:Oleanolic Acid / Q000031:analogs & derivatives*; D009844:Oligosaccharides / Q000737:chemistry / Q000302:isolation & purification; D018517:Plant Roots; D010946:Plants, Medicinal; D012503:Saponins / Q000737:chemistry* / Q000302:isolation & purification; D016339:Spectrometry, Mass, Fast Atom Bombardment; D014315:Triterpenes / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: C096078:28-(rhamnopyranosyl-1-4-glucopyranosyl-1-6-glucopyranosyl) 3-O-(glucopyranosyl-1-4-glucopyranosyl-1-4-arabinopyranosyl)hederagenin; D009844:Oligosaccharides; D012503:Saponins; D014315:Triterpenes; D009828:Oleanolic Acid