title: [Studies on chemical constituents of Galeopsis bifida].
abstract: OBJECTIVE
  To investigate the chemical constituents of Galeopsis bifida.
  
  
  METHODS
  Various chromatographic techniques were employed for isolation and purification of the constituents. The structures were elucidated by chemical and spectral analyses.
  
  
  CONCLUSIONS
  Ten compounds were isolated and identified as chrysoeriol(1), 5,7-dihydroxy-3',4'-dimethoxyflavone(2), hederagenin(3), daucosterol(4), martynoside(5), ajugoside(6), 8-acetyl harpagid(7), 5,7,4'-trihydroxy-3'-methoxyflavone-7-O-beta-D-glucoside(8), 5,6,7,4'-tetrahydroxyflavone-7-O-beta-D-glucoside(9) and 5,7,3',4'-tetrahydroxyflavone-7-O-beta-D-glucoside (10). Compound 6, 7 were found from genus Galeopsis for the first time and rest of compounds were found from G. bifida for the first time.
authors.affiliation: Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China.
authors.forename: Yong-hong
authors.initials: YH
authors.lastname: Zhang
authors.forename: Tao
authors.initials: T
authors.lastname: Wang
authors.forename: Zhi-gang
authors.initials: ZG
authors.lastname: Lu
authors.forename: Han-qing
authors.initials: HQ
authors.lastname: Wang
mesh_terms: D047309:Flavones; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification; D005960:Glucosides / Q000737:chemistry / Q000302:isolation & purification*; D019686:Lamiaceae / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry*; D011714:Pyrans / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D047309:Flavones; D005419:Flavonoids; D005960:Glucosides; D011714:Pyrans; C477173:ajugoside; C077626:8-O-acetylharpagide; C007054:chrysoeriol