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- Title
Two new triterpenoid saponins from Pittosporum senacia Putterlick (Pittosporaceae).
- Authors
Linnek, Jens; Mitaine-Offer, Anne-Claire; Paululat, Thomas; Lacaille-Dubois, Marie-Aleth
- Abstract
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.
- Publication
Magnetic Resonance in Chemistry, 2012, Vol 50, Issue 12, p798
- ISSN
0749-1581
- Publication type
Article
- DOI
10.1002/mrc.3876