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- Title
Two New Triterpene Saponins from Cyclamen africanum Boiss. & Reuter.
- Authors
Bencharif-Betina, Soumeya; Miyamoto, Tomofumi; Tanaka, Chiaki; Kabouche, Zahia; Mitaine-Offer, Anne-Claire; Lacaille-Dubois, Marie Aleth
- Abstract
Two new oleanane-type triterpene saponins, afrocyclamins A and B ( 1 and 2, resp.), were isolated from a MeOH extract of the roots of Cyclamen africanum Boiss. & Reuter, together with three known triterpenoid saponins, lysikokianoside, deglucocyclamin I, and its dicrotalic acid derivative. The structures were elucidated, on the basis of 1D- and 2D-NMR experiments and mass spectrometry as (3 β,20 β)-13,28-epoxy-16-oxo-3-{ O- β- D-xylopyranosyl-(1→2)- O- β- D-glucopyranosyl-(1→4)- O-[ β- D-glucopyranosyl-(1→2)]- α- L-arabinopyranosyl}oxy}oleanan-29-al ( 1) and (3 β,16 α,20 β)-16,28,29-trihydroxy-olean-12-en-3-yl O-4- O-(4-carboxy-3-hydroxy-3-methyl-1-oxobutyl)- β- D-xylopyranosyl-(1→2)- O- β- D-glucopyranosyl-(1→4)- O-[ β- D-glucopyranosyl-(1→2)]- α- L-arabinopyranoside ( 2).
- Subjects
TRITERPENOID saponins; SAPONINS; CYCLAMEN; PLANT extracts; MASS spectrometry
- Publication
Helvetica Chimica Acta, 2012, Vol 95, Issue 9, p1573
- ISSN
0018-019X
- Publication type
Article
- DOI
10.1002/hlca.201200041