title: Oleanane-type glycosides from Tremastelma palaestinum (L.) Janchen.
abstract: Three new oleanane-type glycosides, 1-3, were isolated from the whole plant of Tremastelma palaestinum (L.) Janchen, along with eight known triterpene glycosides. The structures of the new compounds were established as 3-O-[β-d-glucopyranosyl-(1→3)-α-l-rhamnopyranosyl-(1→3)-β-d-glucopyranosyl-(1→3)-α-l-rhamnopyranosyl-(1→2)-α-l-arabinopyranosyl]hederagenin (1), 3-O-[β-d-glucopyranosyl-(1→3)-α-l-rhamnopyranosyl-(1→3)-β-d-glucopyranosyl-(1→3)-α-l-rhamnopyranosyl-(1→2)-α-l-arabinopyranosyl]hederagenin 28-O-β-d-glucopyranosyl-(1→6)-β-d-glucopyranosyl ester (2), and 3-O-[α-l-rhamnopyranosyl-(1→3)-β-d-glucopyranosyl-(1→3)-α-l-rhamnopyranosyl-(1→2)-α-l-arabinopyranosyl]oleanolic acid 28-O-β-d-glucopyranosyl-(1→6)-β-d-glucopyranosyl ester (3) by using 1D- and 2D-NMR techniques and mass spectrometry. This is the first report on the phytochemical investigation of a species belonging to Tremastelma genus.
authors.affiliation: Chemistry Department, Faculty of Science, Ege University, 35100 Bornova, Izmir, Turkey (phone: +902323882369; fax: +902323888264.
authors.forename: Gökhan
authors.initials: G
authors.lastname: Şenel
authors.forename: Derya
authors.initials: D
authors.lastname: Gülcemal
authors.forename: Milena
authors.initials: M
authors.lastname: Masullo
authors.forename: Sonia
authors.initials: S
authors.lastname: Piacente
authors.forename: Tamer
authors.initials: T
authors.lastname: Karayıldırım
mesh_terms: D049917:Dipsacaceae / Q000737:chemistry* / Q000378:metabolism; D006027:Glycosides / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D000432:Methanol / Q000737:chemistry; D008968:Molecular Conformation; D009828:Oleanolic Acid / Q000031:analogs & derivatives / Q000737:chemistry; D035261:Plant Components, Aerial / Q000737:chemistry / Q000378:metabolism; D021241:Spectrometry, Mass, Electrospray Ionization; D014315:Triterpenes / Q000737:chemistry
chemical_list: D006027:Glycosides; D014315:Triterpenes; C413246:oleanane; D009828:Oleanolic Acid; D000432:Methanol
keywords: Glycosides; Oleananes; Saponins; Tremastelma palaestinum