title: Triterpenoid saponins from Cephalaria transsylvanica.
abstract: Two new triterpenoid saponins, transsylvanosides G and H, were isolated from Cephalaria transsylvanica and their structures established as 3-O-[beta-D-glucopyranosyl(1-->4)-beta-D-glucopyranosyl(1-->3)-alpha-L- rhamnopyranosyl(1-->2)-beta-D-xylopyranosyl] hederagenin 28-O-[beta-D-glucopyranosyl(1-->4)-beta-D-xylopyranosyl] ester (1) and 3-O-[beta-D-xylopyranosyl(1-->3)-alpha-L-rhamnopyranosyl-(1-->2)-beta-D- xylopyranosyl] hederagenin (2), respectively. A novel prosapogenin (3) was obtained on the alkaline hydrolysis of 1 and its structure defined as 3-O-[beta-D-glucopyranosyl(1-->4)-beta-D-glucopyranosyl(1-->3)-alpha-L- rhamnopyranosyl(1-->2)-beta-D-xylopyranosyl] hederagenin. The structures of compounds 1-3 were established by spectral and chemical methods.
authors.affiliation: Department of Organic Chemistry, Faculty of Science, Ege University, Izmir, Turkey.
authors.forename: S
authors.initials: S
authors.lastname: Kirmizigül
authors.forename: H
authors.initials: H
authors.lastname: Anil
authors.forename: M E
authors.initials: ME
authors.lastname: Rose
mesh_terms: D002240:Carbohydrate Sequence; D002855:Chromatography, Thin Layer; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D008745:Methylation; D008969:Molecular Sequence Data; D010946:Plants, Medicinal / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry* / Q000302:isolation & purification; D016339:Spectrometry, Mass, Fast Atom Bombardment; D014315:Triterpenes / Q000737:chemistry* / Q000302:isolation & purification; D014421:Turkey
chemical_list: D012503:Saponins; D014315:Triterpenes; C100542:transsylvanoside G; C100544:transsylvanoside H