title: (6S)-Hydroxy-3-oxo-alpha-ionol glucosides from Capparis spinosa fruits.
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.
authors.affiliation: Department of Pharmacognosy, Faculty of Pharmacy, Hacettepe University, 06100 Ankara, Turkey.
authors.forename: Ihsan
authors.initials: I
authors.lastname: Caliş
authors.forename: Ayşe
authors.initials: A
authors.lastname: Kuruüzüm-Uz
authors.forename: Piergiorgio A
authors.initials: PA
authors.lastname: Lorenzetto
authors.forename: Peter
authors.initials: P
authors.lastname: Rüedi
mesh_terms: D005638:Fruit / Q000737:chemistry*; D005960:Glucosides / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D019684:Magnoliopsida / Q000737:chemistry*; D015394:Molecular Structure; D009005:Monosaccharides / Q000737:chemistry / Q000302:isolation & purification; D045792:Norisoprenoids; D010946:Plants, Medicinal / Q000737:chemistry
chemical_list: D005960:Glucosides; D009005:Monosaccharides; D045792:Norisoprenoids; C105665:corchoionoside C; C454581:spionoside A; C454582:spionoside B