title: A new prenylated flavonoid from propolis collected in Okinawa, Japan.
abstract: The new prenylflavonoid, isonymphaeol-B (1), together with three known compounds, nymphaeol-A (2), nymphaeol-B (3), and nymphaeol-C (4), were isolated from propolis collected in Okinawa, the southern-most prefecture of Japan. The structure of each compound was determined by spectral methods, including mass spectrometry and 2D NMR. Each compound had 1,1-diphenyl-2-picryl-hydrazyl radical-scavenging activity.
authors.affiliation: Laboratory of Functional Food Science and COE Program in the 21st Century, School of Food and Nutritional Sciences, University of Shizuoka, Shizuoka, Japan. kumazawa@smail.u-shizuoka-ken.ac.jp
authors.forename: Shigenori
authors.initials: S
authors.lastname: Kumazawa
authors.forename: Hitomi
authors.initials: H
authors.lastname: Goto
authors.forename: Tomoko
authors.initials: T
authors.lastname: Hamasaka
authors.forename: Syuichi
authors.initials: S
authors.lastname: Fukumoto
authors.forename: Takunori
authors.initials: T
authors.lastname: Fujimoto
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Nakayama
mesh_terms: D001713:Biphenyl Compounds / Q000378:metabolism; D044950:Flavanones / Q000737:chemistry / Q000494:pharmacology; D005419:Flavonoids / Q000737:chemistry* / Q000494:pharmacology; D016166:Free Radical Scavengers / Q000737:chemistry / Q000494:pharmacology; D006834:Hydrazines / Q000378:metabolism; D007564:Japan; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D010851:Picrates; D011429:Propolis / Q000737:chemistry*; D017368:Protein Prenylation
chemical_list: D001713:Biphenyl Compounds; D044950:Flavanones; D005419:Flavonoids; D016166:Free Radical Scavengers; D006834:Hydrazines; D010851:Picrates; D011429:Propolis; C004931:1,1-diphenyl-2-picrylhydrazyl