title: Tetrapterosides A and B, two new oleanane-type saponins from Tetrapleura tetraptera.
abstract: From the stem bark of Tetrapleura tetraptera, two new oleanane-type saponins, tetrapteroside A 3-O-{6-O-[(2E,6S)-2,6-dimethyl-6-hydroxyocta-2,7-dienoyl]-beta-D-glucopyranosyl-(1 --> 2)-beta-D-glucopyranosyl-(1 --> 3)-beta-D-glucopyranosyl-(1 --> 4)-[beta-D-glucopyranosyl-(1 --> 2)]-beta-D-glucopyranosyl}-3,27-dihydroxyoleanolic acid (1), and tetrapteroside B 3-O-{ beta-D-glucopyranosyl-(1 --> 2)-6-O-[(E)-feruloyl]-beta-D-glucopyranosyl-(1 --> 3)-beta-D-glucopyranosyl-(1 --> 4)-[beta-D-glucopyranosyl-(1 --> 2)]-beta-D-glucopyranosyl}-3,27-dihydroxyoleanolic acid (2), were isolated. Further extractions from the roots led to the isolation of four known oleanane-type saponins. Their structures were elucidated by the combination of mass spectrometry (MS), one and two-dimensional NMR experiments.
authors.affiliation: Laboratoire de Pharmacognosie, UMIB, UPRES EA 3660, Faculté de Pharmacie, Université de Bourgogne, 7 bd. Jeanne D' Arc, BP 87900, 21079 Dijon cedex, France.
authors.forename: Olivier Placide
authors.initials: OP
authors.lastname: Noté
authors.forename: Anne-Claire
authors.initials: AC
authors.lastname: Mitaine-Offer
authors.forename: Tomofumi
authors.initials: T
authors.lastname: Miyamoto
authors.forename: Thomas
authors.initials: T
authors.lastname: Paululat
authors.forename: Dieudonné Emmanuel
authors.initials: DE
authors.lastname: Pegnyemb
authors.forename: Marie-Aleth
authors.initials: MA
authors.lastname: Lacaille-Dubois
mesh_terms: D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D012503:Saponins / Q000737:chemistry* / Q000302:isolation & purification; D031305:Tetrapleura / Q000737:chemistry*
chemical_list: D012503:Saponins; C539922:tetrapteroside A; C539923:tetrapteroside B