title: [Studies on chemical constituents in roots of Heracleum rapula].
abstract: OBJECTIVE
  To study the chemical constituents in roots of Heracleum rapula.
  
  
  METHODS
  The constituents were isolated by column chromatography on silica gel and ODS, and identified by spectroscopic methods.
  
  
  RESULTS
  Nine compounds, osthol ( I ), bergapten (II), xanthotoxin (III), isopimpinellin (IV), imperatorin (V), isoimperatorin (VI), cnidilin (VII), phellopterin (VIII), rivulobirin A (IX) were isolated and identified.
  
  
  CONCLUSIONS
  Compounds VI, VII, VIII, IX were isolated from this plant for the first time.
authors.affiliation: Institute of Chinese Materia Madica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
authors.forename: Yuan-Yan
authors.initials: YY
authors.lastname: Liu
authors.forename: Cun
authors.initials: C
authors.lastname: Zhang
authors.forename: Li
authors.initials: L
authors.lastname: Li
authors.forename: Yong-Qing
authors.initials: YQ
authors.lastname: Xiao
mesh_terms: D003374:Coumarins / Q000737:chemistry / Q000302:isolation & purification*; D011564:Furocoumarins / Q000737:chemistry / Q000302:isolation & purification*; D030002:Heracleum / Q000737:chemistry*; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*
chemical_list: D003374:Coumarins; D011564:Furocoumarins; C570292:rivulobirin A; C055542:isoimperatorin; C104601:phellopterin