title: Malonylated flavonol glycosides from the petals of Clitoria ternatea.
abstract: Three flavonol glycosides, kaempferol 3-O-(2"-O-alpha-rhamnosyl-6"-O-malonyl)-beta-glucoside, quercetin 3-O-(2"-O-alpha-rhamnosyl-6"-O-malonyl)-beta-glucoside, and myricetin 3-O-(2",6"-di-O-alpha-rhamnosyl)-beta-glucoside were isolated from the petals of Clitoria ternatea cv. Double Blue, together with eleven known flavonol glycosides. Their structures were identified using UV, MS, and NMR spectroscopy. They were characterized as kaempferol and quercetin 3-(2(G)- rhamnosylrutinoside)s, kaempferol, quercetin, and myricetin 3-neohesperidosides, 3-rutinosides, and 3-glucosides in the same tissue. In addition, the presence of myricetin 3-O-(2"-O-alpha-rhamnosyl-6"-O-malonyl)-beta-glucoside was inferred from LC/MS/MS data for crude petal extracts. The flavonol compounds identified in the petals of C. ternatea differed from those reported in previous studies.
authors.affiliation: Division of Plant Cell Technology, Aomori Green BioCenter, 221 Nogi-Yamaguchi, Aomori, Aomori 030-0142, Japan. kazuma@md.neweb.ne.jp
authors.forename: Kohei
authors.initials: K
authors.lastname: Kazuma
authors.forename: Naonobu
authors.initials: N
authors.lastname: Noda
authors.forename: Masahiko
authors.initials: M
authors.lastname: Suzuki
mesh_terms: D002851:Chromatography, High Pressure Liquid; D031292:Clitoria / Q000737:chemistry*; D005419:Flavonoids / Q000737:chemistry* / Q000302:isolation & purification*; D035264:Flowers / Q000737:chemistry*; D005960:Glucosides / Q000737:chemistry* / Q000302:isolation & purification*; D006027:Glycosides / Q000737:chemistry* / Q000302:isolation & purification*; D044949:Kaempferols; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D015394:Molecular Structure; D011794:Quercetin / Q000031:analogs & derivatives / Q000737:chemistry* / Q000302:isolation & purification*
chemical_list: D005419:Flavonoids; D005960:Glucosides; D006027:Glycosides; D044949:Kaempferols; C473510:quercetin 3-O-(2''-O-rhamnosyl-6''-O-malonyl)-glucoside; C006552:kaempferol; C040015:myricetin; D011794:Quercetin