6533b85efe1ef96bd12bfeb2

RESEARCH PRODUCT

Tetrapterosides A and B, two new oleanane-type saponins fromTetrapleura tetraptera

Olivier Placide NotéAnne Claire Mitaine-offerTomofumi MiyamotoThomas PaululatDieudonné Emmanuel PegnyembMarie Aleth Lacaille-dubois

subject

Stem barkMagnetic Resonance SpectroscopyMolecular StructureTetrapleura tetrapterabiologyStereochemistryChemistryTetrapteroside BGeneral ChemistryNuclear magnetic resonance spectroscopySaponinsType (model theory)biology.organism_classificationchemistry.chemical_compoundTetrapleuraGeneral Materials ScienceTetrapleuraTwo-dimensional nuclear magnetic resonance spectroscopyOleanane

description

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.

https://doi.org/10.1002/mrc.2381