title: Isolation of two new C-glucofuranosyl isoflavones from Pueraria lobata (Wild.) Ohwi with HPLC-MS guiding analysis.
abstract: A profiling analysis of the total isoflavone extract of the root of Pueraria lobata (Wild.) Ohwi was performed using HPLC coupled with ESI-ion trap mass spectrometry. A total of seven isoflavones were identified according to their retention times, UV, MS data, and comparing with the literature data. Among them, two proposed new compounds were isolated and their structures were determined to be 8-C-alpha-glucofuranosyl-7,4'-dihydroxyisoflavone and 8-C-beta-glucofuranosyl-7,4'-dihydroxyisoflavone, named as neopuerarin A (7) and neopuerarin B (6), on the basis of chemical and spectral analyses.
authors.affiliation: College of Life Science and Chemical Engineering, Huaiyin Institute of Technology, Huai'an, China.
authors.forename: Hai-Jiang
authors.initials: HJ
authors.lastname: Zhang
authors.forename: Xiao-Ping
authors.initials: XP
authors.lastname: Yang
authors.forename: Kui-Wu
authors.initials: KW
authors.lastname: Wang
mesh_terms: D002851:Chromatography, High Pressure Liquid; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification*; D005960:Glucosides / Q000737:chemistry / Q000302:isolation & purification*; D007529:Isoflavones / Q000737:chemistry / Q000302:isolation & purification*; D013058:Mass Spectrometry; D015394:Molecular Structure; D018517:Plant Roots / Q000737:chemistry; D029908:Pueraria / Q000737:chemistry*; D013237:Stereoisomerism
chemical_list: D004365:Drugs, Chinese Herbal; D005960:Glucosides; D007529:Isoflavones; C549362:neopuerarin A