title: [Chemical constituents of Ligularia songarica].
abstract: OBJECTIVE
  To study the chemical constituents of Ligularia songarica.
  
  
  METHODS
  Isolation and purification were carried out on repeated silica gel column chromatography. The compounds structures were identified by physico-chemical properties and spectral analyses.
  
  
  RESULTS
  Ten compounds were isolated and identified as benzofuranoeremophil-2-ene (1), 6-angeloyloxy-1,10-epoxy-euryopsin (2), 2-hydroxyplatyphyllide (3), 1β-hydroxy-6,9-dien-8-oxoeremophy-11-nor-11-ketone (4), 2-isopropenyl-6-acetyl-8-methoxy-13-benzodioxin-4-one (5), 1β-hydroxy-6,9-dien-8-oxo-11-nor-11-hydroxyeremophilane (6), isopetasin (7), 6β,10α-dihydroxy-1-oxoeremophila-7 (11), 8(9)-diene-8,12-olide (8), 10α-hydroxy-1-oxo-eremophila-7 (11), 8(9)-diene-8,12-olide (9) and 6β-angeloyloxy-1β,10β-epoxy-9-oxo-furaneremophilane (10).
  
  
  CONCLUSIONS
  Compounds 2-9 are obtained from this plant for the first time.
authors.forename: Mei
authors.initials: M
authors.lastname: Li
authors.forename: Li-na
authors.initials: LN
authors.lastname: Li
authors.forename: Guan-qiong
authors.initials: GQ
authors.lastname: Yan
authors.forename: Qi
authors.initials: Q
authors.lastname: Wang
mesh_terms: D019659:Asteraceae / Q000737:chemistry*; D064209:Phytochemicals / Q000302:isolation & purification*; D012717:Sesquiterpenes / Q000302:isolation & purification
chemical_list: D064209:Phytochemicals; D012717:Sesquiterpenes; C418728:isopetasin