title: [Studies on the flavonoids in herb from Scutellaria barbata].
abstract: OBJECTIVE
  To study flavonoids in Scutellaria barbata and elucidate their structures.
  
  
  METHODS
  Compounds were isolated and purified by normal column chromatography, paper thin layer chromatography and Sephadex chromatography. The chemical structures were elucidated by ESI mass and NMR spectra.
  
  
  RESULTS
  Five flavonoids were isolated from S. barbata and identified as apigenin (1), luteolin (2), ethyl-7-O-apigenin-glucuronate (3), apigenin-7-O-beta-glucoside (4), and apigenin-7-O-neohesperidoside (5), in addition to benzyaldehyde (6).
  
  
  CONCLUSIONS
  Flavonoidglycoside (3), (4) and (5) were isolated from S. barbata for the first time.
authors.affiliation: Key Laboratory of Bioorganic and Molecular Engineering, Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
authors.forename: Wen-shu
authors.initials: WS
authors.lastname: Wang
authors.forename: Ya-wei
authors.initials: YW
authors.lastname: Zhou
authors.forename: Yun-hua
authors.initials: YH
authors.lastname: Ye
authors.forename: Nan
authors.initials: N
authors.lastname: Du
mesh_terms: D047310:Apigenin / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification*; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D005965:Glucuronates / Q000737:chemistry / Q000302:isolation & purification*; D010946:Plants, Medicinal / Q000737:chemistry*; D031363:Scutellaria / Q000737:chemistry*
chemical_list: D005419:Flavonoids; D005965:Glucuronates; C500371:ethyl 7-O-apigenin-glucuronate; C057792:apigetrin; D047310:Apigenin