title: Acylated flavone C-glycosides from Cucumis sativus.
abstract: Leaves of Cucumis sativus plants treated with silicon and infected with Sphaerotheca fuliginea yielded five new acylated flavone C-glycosides identified as isovitexin 2"-O-(6"'-(E)-p-coumaroyl)glucoside (6), isovitexin 2"-O-(6"'-(E)-p-coumaroyl)glucoside-4'-O-glucoside (7), isovitexin 2"-O-(6"'-(E)-feruloyl)glucoside-4'-O-glucoside (11), isoscoparin 2"-O-(6"'-(E)-p-coumaroyl)glucoside (9), and isoscoparin 2"-O-(6"'-(E)-feruloyl)glucoside-4'-O-glucoside (12). The known flavone-glycosides isovitexin (1), saponarin (2), saponarin 4'-O-glucoside (3), vicenin-2 (4), apigenin 7-O-(6"-O-p-coumaroylglucoside) (5), isovitexin 2"-O-(6"'-(E)-feruloyl)glucoside (8) and isoscoparin 2"-O-(6"'-(E)-feruloyl)glucoside (10), were also identified in this plant material.
authors.affiliation: Natural Resources Canada, Canadian Forest Service, Great Lakes Forestry Centre, 1219 Queen Street East, Sault Ste. Marie, Ontario, P6A 5M7, Canada. mabouzai@nrcan.gc.ca
authors.forename: M M
authors.initials: MM
authors.lastname: Abou-Zaid
authors.forename: D A
authors.initials: DA
authors.lastname: Lombardo
authors.forename: G C
authors.initials: GC
authors.lastname: Kite
authors.forename: R J
authors.initials: RJ
authors.lastname: Grayer
authors.forename: N C
authors.initials: NC
authors.lastname: Veitch
mesh_terms: D000215:Acylation; D002851:Chromatography, High Pressure Liquid; D003373:Coumaric Acids / Q000737:chemistry* / Q000302:isolation & purification; D018553:Cucumis sativus / Q000737:chemistry* / Q000254:growth & development; D004121:Dimethyl Sulfoxide; D005419:Flavonoids / Q000737:chemistry* / Q000302:isolation & purification; D006027:Glycosides / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D008968:Molecular Conformation; D015394:Molecular Structure; D018515:Plant Leaves / Q000737:chemistry / Q000254:growth & development; D012825:Silicon; D013056:Spectrophotometry, Ultraviolet
chemical_list: D003373:Coumaric Acids; D005419:Flavonoids; D006027:Glycosides; D004121:Dimethyl Sulfoxide; D012825:Silicon