title: Structures and radical-scavenging activities of phenolic constituents from the bark of Picea jezoensis var. jezoensis.
abstract: The MeOH extract of the bark of Picea jezoensis var. jezoensis was found to show scavenging activity for the DPPH radical. Bioassay-guided fractionation led to the isolation of two new flavonostilbenes named jezonocinols A ( 1) and B ( 2) and one nor-flavonostilbene named jezonocinol C ( 3) together with six known phenolic compounds. Their structures were elucidated by spectroscopic methods, and the absolute configurations of jezonocinols A ( 1) and B ( 2) were determined by Mosher's method, CD, and NOESY data.
authors: Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan. wada@gly.oups.ac.jp
authors: Shun-ichi
authors: S
authors: Wada
authors: Yumiko
authors: Y
authors: Yasui
authors: Teppei
authors: T
authors: Hitomi
authors: Reiko
authors: R
authors: Tanaka
mesh_terms: D001713:Biphenyl Compounds; D047309:Flavones / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology*; D016166:Free Radical Scavengers / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology*; D007564:Japan; D015394:Molecular Structure; D010636:Phenols / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology*; D028222:Picea / Q000737:chemistry*; D010851:Picrates / Q000494:pharmacology; D024301:Plant Bark / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D013267:Stilbenes / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology*
chemical_list: D001713:Biphenyl Compounds; D047309:Flavones; D016166:Free Radical Scavengers; D010636:Phenols; D010851:Picrates; D013267:Stilbenes; C524909:jezonocinol A; C524910:jezonocinol B; C004931:1,1-diphenyl-2-picrylhydrazyl