title: [Studies on the chemical constituents of essential oil from roots and rhizomes of Patrinia rupestris].
abstract: OBJECTIVE
  To study the chemical constituents of the essential oil from the roots and rhizomes of Patrinia rupestris.
  
  
  METHODS
  The essential oil was extracted by steam distillation. The components were separated and identified by gas chromatography mass spectrometry and elucidated on the standard mass spectral data. Gas chromatography showed their percentages by area normalization method.
  
  
  RESULTS
  Seventeen constituents were identified which make up 74.57% of the oil.
  
  
  CONCLUSIONS
  Transcaryophyllene (38.41%) was the main constituent, and other constituents include alpha-gurjunene, caryophyllene oxide, humulene, 9,12-octadecadienoic acid, etc.
authors.affiliation: School of Pharmacy, Beijing Medical University, Beijing 100083.
authors.forename: W
authors.initials: W
authors.lastname: Zhang
authors.forename: H
authors.initials: H
authors.lastname: Chen
mesh_terms: D008401:Gas Chromatography-Mass Spectrometry; D000081222:Monocyclic Sesquiterpenes; D009822:Oils, Volatile / Q000737:chemistry* / Q000302:isolation & purification; D032405:Patrinia / Q000737:chemistry* / Q000145:classification; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D000081223:Polycyclic Sesquiterpenes; D027343:Rhizome / Q000737:chemistry; D012717:Sesquiterpenes / Q000032:analysis*; D013237:Stereoisomerism
chemical_list: D000081222:Monocyclic Sesquiterpenes; D009822:Oils, Volatile; D000081223:Polycyclic Sesquiterpenes; D012717:Sesquiterpenes; C042686:humulene; C024714:caryophyllene