title: [Analysis of essential oil from different organs of Caryopteris tangutica].
abstract: OBJECTIVE
  To study the main chemical components of essential oils from Caryopteris tangutica.
  
  
  METHODS
  The chemical compositions of essential oils obtained by hydrodistillation from different organs of Caryopteris tangutica were separately analyzed and identified by GC-MS and Kovats retention index. The relative contents of the components by the peak-area normalization method adopted in gas chromatography.
  
  
  RESULTS
  13.48 and 42 components were separately identified from stems, leaves and flowers. The components and relative contents of the leaves were similar with the flowers, and the main constituents were Myrtenal (2.73%, 1.69%), trans-Pinocarvyl acetate (46.69%, 55.48%), Myrtenyl acetate (1.17%, 1.42%), beta-Cedrene (1.62%, 3.21%), Caryophyllene oxide (1.67%, 2.73%) and so on. The components of the stems were different from others, and the main constituents were hexadecanoic acid (47.32%), trans-Pinocarvyl acetate (24.19%), phytol (0.77%).
  
  
  CONCLUSIONS
  The components and relative contents of the essential oils among stems, leaves and flowers were distinctly different, and each of them had a great range of potential utilities and a prospect of development.
authors.affiliation: College of Life Sciences,Shanxi Normal University/Key Laboratory of Medicinal Plant Resources and Natural Pharmaceutical Chemistry, Ministry of Education, Xi'an 710062, China. yanping1225@stu.snnu.edu.cn
authors.forename: Ping
authors.initials: P
authors.lastname: Yan
authors.forename: Zhe-zhi
authors.initials: ZZ
authors.lastname: Wang
mesh_terms: D000475:Alkenes / Q000032:analysis*; D000081008:Bicyclic Monoterpenes; D005227:Fatty Acids / Q000032:analysis; D035264:Flowers / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D009822:Oils, Volatile / Q000737:chemistry* / Q000302:isolation & purification; D018515:Plant Leaves / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D000081223:Polycyclic Sesquiterpenes; D012717:Sesquiterpenes / Q000032:analysis; D013729:Terpenes / Q000032:analysis*; D029648:Verbenaceae / Q000737:chemistry*
chemical_list: D000475:Alkenes; D000081008:Bicyclic Monoterpenes; D005227:Fatty Acids; D009822:Oils, Volatile; D000081223:Polycyclic Sesquiterpenes; D012717:Sesquiterpenes; D013729:Terpenes; C000393:cedrene; C061545:myrtenal