6533b825fe1ef96bd128263d
RESEARCH PRODUCT
Two new triterpenoid saponins fromPittosporum senaciaPutterlick (Pittosporaceae)
Thomas PaululatAnne Claire Mitaine-offerMarie Aleth Lacaille-duboisJens Linneksubject
GlycosylationbiologyStereochemistryElectrospray ionizationPittosporaceaeGeneral ChemistryNuclear magnetic resonance spectroscopybiology.organism_classificationchemistry.chemical_compoundAglyconechemistryGeneral Materials SciencePittosporum senaciaOleanolic acidTwo-dimensional nuclear magnetic resonance spectroscopydescription
From the branches of Pittosporum senacia Putterlick (Pittosporaceae), two new triterpenoid saponins, senaciapittosides A and B (1, 2), were isolated. Their structures were elucidated by extensive analysis of one- and two-dimensional nuclear magnetic resonance spectroscopy, high-resolution electrospray ionization mass spectrometry (HR-ESIMS) and chemical evidence as 3-O-[β-d-glucopyranosyl-(1 2)]-[α-l-arabinopyranosyl-(1 3)]-[α-l-arabinofuranosyl-(1 4)]-β-d-glucuronopyranosyl oleanolic acid 28-O-β-d-glucopyranosyl ester (1) and 3-O-[β-d-glucopyranosyl-(1 2)]-[α-l-arabinopyranosyl-(1 3)]-[α-l-arabinofuranosyl-(1 4)]-β-d-glucuronopyranosyl-22-O-α-l-arabinopyranosyl-21-acetoxy R1-barrigenol (2). Compound 2 presents an unusual glycosylation at C-22 of its aglycone. Copyright © 2012 John Wiley & Sons, Ltd.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-09-27 | Magnetic Resonance in Chemistry |