title: [A new alkaloids isolated from tetraploidy banlangen].
abstract: OBJECTIVE
  To investigate the chemical constituents of tetraploidy Banlangen (Isatis indigotica Fort.).
  
  
  METHODS
  Compounds were separated by chromatography on silica gel. Their structures were determined by spectral analysis and chemical evidence.
  
  
  RESULTS
  Three compounds were isolated. Their structures were identified as (E)-2-[(3'-indole) cyanomethylene]-3-indolinone (I), 2-(4-hydroxy-3-methoxyphenyl)-4-[(4-hydroxy-3-methoxy-phenyl)-methyl]-3- hydroxymethyl-tetrahydro-furan (II) and 2-methoxy-4-[tetrahydro-4-[(4-hydroxy-3-methoxy-phenyl)-methyl]-3- hydroxymethyl-2-furanyl] phenyl-1-O-beta-D-glucopyranoside (III).
  
  
  CONCLUSIONS
  Compound I is a new compound.
mesh_terms: D007211:Indoles / Q000737:chemistry*; D031219:Isatis / Q000737:chemistry* / Q000235:genetics; D015394:Molecular Structure; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry* / Q000235:genetics; D011123:Polyploidy
chemical_list: C488397:(E)-2-((3'-indole) cyanomethylene)-3-indolinone; D007211:Indoles