title: Radical scavenging activity of phenylpropanoid glycosides in Caryopteris incana.
abstract: In our screening program for antioxidants from traditional drugs and foodstuffs, one new phenylpropanoid glycoside, incanoside, was isolated together with four known phenylpropanoid glycosides, verbascoside, isoverbascoside, phlinoside A, and 6-O-caffeoyl-beta-D-glucose from the whole plant of Caryopteris incana (Thunb.) Miq. On the basis of chemical evidence and spectral analysis data, the structure of incanoside was determined to be 1-O-(3,4-dihydroxyphenyl)ethyl-O-beta-D-glucopyranosyl (1-->2)-alpha-L-rhamnopyranosyl(1-->3)-6-O-caffeoyl-beta-D- glucopyranoside. The four phenylpropanoid glycosides exhibited potent radical scavenging activity against DPPH, hydroxyl (.OH), and superoxide anion (O2-.) radicals.
authors.affiliation: Faculty of Agriculture, Yamagata University, Japan.
authors.forename: J J
authors.initials: JJ
authors.lastname: Gao
authors.forename: K
authors.initials: K
authors.lastname: Igalashi
authors.forename: M
authors.initials: M
authors.lastname: Nukina
mesh_terms: D000107:Acetylation; D015764:Bepridil / Q000031:analogs & derivatives / Q000737:chemistry; D001713:Biphenyl Compounds; D002240:Carbohydrate Sequence; D002681:China; D004578:Electron Spin Resonance Spectroscopy; D016166:Free Radical Scavengers / Q000737:chemistry* / Q000302:isolation & purification; D005609:Free Radicals / Q000737:chemistry; D006027:Glycosides / Q000737:chemistry* / Q000302:isolation & purification; D006868:Hydrolysis; D017665:Hydroxyl Radical / Q000737:chemistry; D008969:Molecular Sequence Data; D010851:Picrates; D010946:Plants, Medicinal / Q000737:chemistry*; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013481:Superoxides / Q000737:chemistry
chemical_list: D001713:Biphenyl Compounds; D016166:Free Radical Scavengers; D005609:Free Radicals; D006027:Glycosides; D010851:Picrates; C121317:incanoside; D013481:Superoxides; D017665:Hydroxyl Radical; D015764:Bepridil; C004931:1,1-diphenyl-2-picrylhydrazyl