title: [Study on the chemical components of volatile oil from Euphorbia pekinensis radix].
abstract: OBJECTIVE
  To analyze the volatile oil from Radix Euphorbia Pekinensis.
  
  
  METHODS
  Volatile oil was extracted from Radix Euphorbia Pekinensis by steam distillation and GC-MS was employed for detecting the content of the constituents. The relative content of the chemical constituents were calculated using area normalization method.
  
  
  RESULTS
  35 peaks were separated and 29 constituents were identified. The yield rate of volatile oil extracted from the dried radix of Euphorbia Pekinensis was 0.3%.
  
  
  CONCLUSIONS
  The main components of volatile oil were agarospirol and hedycargol and their contents were 49.23% and 20.66% respectively. This paper provides valuable experimental data for further research of Radix Euphorbia Pekinensis.
authors.affiliation: School of Chinese Pharmaceutical Sciences, Beijing University of Chinese Medicine, Beijing 100102, China. summer_clover8916@126.com
authors.forename: Xue-Fei
authors.initials: XF
authors.lastname: Li
authors.forename: Gen-Ben
authors.initials: GB
authors.lastname: Bai
authors.forename: Ru-Feng
authors.initials: RF
authors.lastname: Wang
authors.forename: Ji-Feng
authors.initials: JF
authors.lastname: Yang
authors.forename: Ming
authors.initials: M
authors.lastname: Yuan
authors.forename: Yan-Nan
authors.initials: YN
authors.lastname: An
authors.forename: Xiu-Wen
authors.initials: XW
authors.lastname: Wu
mesh_terms: D028481:Euphorbia / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D009822:Oils, Volatile / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification*; D018517:Plant Roots / Q000737:chemistry; D012717:Sesquiterpenes / Q000032:analysis* / Q000737:chemistry; D013141:Spiro Compounds / Q000032:analysis* / Q000737:chemistry; D013227:Steam; D013729:Terpenes / Q000032:analysis / Q000737:chemistry
chemical_list: D009822:Oils, Volatile; D012717:Sesquiterpenes; D013141:Spiro Compounds; D013227:Steam; D013729:Terpenes; C065858:hinesol