title: [Chemical constituents from water extract of Radix isatidis].
abstract: OBJECTIVE
  To study the chemical constituents from water extract of Radix isatidis. (Isatis indigotica Fort. ).
  
  
  METHODS
  The water extract was underwent absorption by D101 macroporous resin, the portion eluted by ethanol of different concentrations was isolated and purified on silica gel column repeatedly. The obtained compounds were identified and structurally elucidated by their physico-chemical properties and spectral analysis.
  
  
  RESULTS
  Five compounds were isolated from water extract of Radix isatidis, and were partly identified separately: 3-[2'-(5'-hydroxymethyl) furyl] -1 (2H) -isoquinolinone-7-O-beta-D-glucoside (I), lariciresinol-4,4'-di-O-beta-D-glucopyranoside (II), lariciresinol-4-O-beta-D-glucopyranoside (III), 2-hydroxy-1, 4-benzenedicarboxylic acid (IV), mannitol (V).
  
  
  CONCLUSIONS
  Compound I is a new compound and compounds IV and V were isolated from the plant for the first time.
authors.affiliation: Nanjing University of Traditional Chinese Medicine, Nanjing 210046, China.
authors.forename: Li-Wei
authors.initials: LW
authors.lastname: He
authors.forename: Xiang
authors.initials: X
authors.lastname: Li
authors.forename: Jian-Wei
authors.initials: JW
authors.lastname: Chen
authors.forename: Dong-Dong
authors.initials: DD
authors.lastname: Sun
authors.forename: Wen-Zheng
authors.initials: WZ
authors.lastname: Jü
authors.forename: Kang-Cai
authors.initials: KC
authors.lastname: Wang
mesh_terms: D031219:Isatis / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D010936:Plant Extracts / Q000032:analysis*
chemical_list: D010936:Plant Extracts