title: Anti-oxidative compounds in barley tea.
abstract: Five phenolic compounds, p-hydroxyacetophenone, 5,7-dihydroxychromone, naringenin, quercetin, and iso-americanol A, were found first time in the barley tea, together with the known compounds, p-hydroxybenzaldehyde, 3,4-dihydroxybenzaldehyde, p-hydroxybenzoic acid, vanillic acid, and p-coumaric acid. The anti-oxidative properties were evaluated by measuring their peroxynitrite-scavenging activities. Among these compounds, 3,4-dihydroxybenzaldehyde, p-coumaric acid, quercetin, and isoamericanol A showed stronger activities than that of BHT (butylated hydroxytoluene) at 400 microM.
authors.affiliation: Faculty of Agriculture, Shizuoka University, 836 Ohya, Shizuoka 422-8529, Japan. acheto@agr.shizuoka.ac.jp
authors.forename: Hideo
authors.initials: H
authors.lastname: Etoh
authors.forename: Kazushi
authors.initials: K
authors.lastname: Murakami
authors.forename: Tokiyasu
authors.initials: T
authors.lastname: Yogoh
authors.forename: Hajime
authors.initials: H
authors.lastname: Ishikawa
authors.forename: Yoshiyasu
authors.initials: Y
authors.lastname: Fukuyama
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Tanaka
mesh_terms: D000975:Antioxidants / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D004146:Dioxanes; D016166:Free Radical Scavengers / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D001467:Hordeum / Q000737:chemistry*; D015394:Molecular Structure; D030421:Peroxynitrous Acid / Q000737:chemistry
chemical_list: D000975:Antioxidants; D004146:Dioxanes; D016166:Free Radical Scavengers; C074373:americanol A; D030421:Peroxynitrous Acid