Tetrapterosides A and B, two new oleanane-type saponins from Tetrapleura tetraptera.
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.
Noté
Olivier Placide
OP
Laboratoire de Pharmacognosie, UMIB, UPRES EA 3660, Faculté de Pharmacie, Université de Bourgogne, 7 bd. Jeanne D' Arc, BP 87900, 21079 Dijon cedex, France.
Mitaine-Offer
Anne-Claire
AC
Miyamoto
Tomofumi
T
Paululat
Thomas
T
Pegnyemb
Dieudonné Emmanuel
DE
Lacaille-Dubois
Marie-Aleth
MA
D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D012503:Saponins / Q000737:chemistry* / Q000302:isolation & purification; D031305:Tetrapleura / Q000737:chemistry*
D012503:Saponins; C539922:tetrapteroside A; C539923:tetrapteroside B