title: [Chemical constituents of Jasminum giraldii and their antioxidant activity].
abstract: Ten compounds were isolated from the barks of Jasminum giraldii by means of various of chromatographic techniques such as silica gel, Sephadex LH-20 and Rp-HPLC. Their structures were identified by spectroscopic data analysis as (+)-medioresinol (1), (+) -syringaresinol (2), syringaresinol-4'-O-beta-D-glucopyranoside (3), oleanic acid (4), 3-methoxy-4-hydroxy-trans-cinnamaldehyde (5), trans-sinapaldehyde (6), syringaldehyde (7), 1-(4-methoxy -phenyl) -ethanol (8), trans-cinnamic acid (9), and 4-(1-methoxyethyl) -phenol (10). Among them, compounds 1-3, 5-8 and 10 were isolated from the J. genus for the first time and compounds 4 and 9 were obtained from J. giraldii for the first time. In the DPPH free radical scavenging assay, compound 1 exhibited significant activity (IC50 55.1 micromol x L(-1)), compared with vitamin C(IC50 59.9 micromol x L(-1)); and compound 2 showed moderate activity (IC50 79.0 micromol x L(-1)), compared with 2, 6-di-tert-butyl4-methylphenol (IC50 236 micromol x L(-1)).
authors.forename: Xiu-Peng
authors.initials: XP
authors.lastname: Zhang
authors.forename: Hui
authors.initials: H
authors.lastname: Qin
authors.forename: Fang
authors.initials: F
authors.lastname: Yang
authors.forename: Jiang
authors.initials: J
authors.lastname: Chai
authors.forename: Xin
authors.initials: X
authors.lastname: Wang
authors.forename: Xiao-Mei
authors.initials: XM
authors.lastname: Song
authors.forename: Qi-Bing
authors.initials: QB
authors.lastname: Mei
authors.forename: Feng
authors.initials: F
authors.lastname: Feng
authors.forename: Zheng-Gang
authors.initials: ZG
authors.lastname: Yue
mesh_terms: D000975:Antioxidants / Q000737:chemistry* / Q000302:isolation & purification; D004365:Drugs, Chinese Herbal / Q000737:chemistry* / Q000302:isolation & purification; D031660:Jasminum / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D021241:Spectrometry, Mass, Electrospray Ionization
chemical_list: D000975:Antioxidants; D004365:Drugs, Chinese Herbal