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(6S)-Hydroxy-3-oxo-alpha-ionol glucosides from Capparis spinosa fruits |
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| Authors: | Caliş Ihsan Kuruüzüm-Uz Ayşe Lorenzetto Piergiorgio A Rüedi Peter |
| Affiliation: | Department of Pharmacognosy, Faculty of Pharmacy, Hacettepe University, 06100 Ankara, Turkey. |
| Abstract: | Two new (6S)-hydroxy-3-oxo-alpha-ionol glucosides, together with corchoionoside C ((6S,9S)-roseoside) and a prenyl glucoside, were isolated from mature fruits of Capparis spinosa. The structures were established on the basis of spectroscopic, chiroptic and chemical evidence. In addition, the 13C-resonance of C-9 was found to be of particular diagnostic value in assigning the absolute configuration at that center in ionol glycosides. The alpha-ionol derivatives are metabolites of (+)-(S)-abscisic acid. |
| Keywords: | Capparis spinosa Capparidaceae (6S)-Hydroxy-3-oxo-α-ionol glucosides Abscisic acid metabolites 1H NMR 13C NMR CD spectra Absolute configuration |
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