title: Essential oil composition of Eucalyptus microtheca and Eucalyptus viminalis.
abstract: OBJECTIVE
  Eucalyptus (Fam. Myrtaceae) is a medicinal plant and various Eucalyptus species possess potent pharmacological actions against diabetes, hepatotoxicity, and inflammation. This study aims to investigate essential oil composition from leaves and flowers of E. microtheca and E. viminalis leaves growing in the Southeast of Iran.
  
  
  METHODS
  The aerial parts of these plants were collected from Zahedan, Sistan and Baluchestan province, Iran in 2013. After drying the plant materials in the shade, the chemical composition of the essential oils was obtained by hydro-distillation method using a Clevenger-type apparatus and analyzed by GC/MS.
  
  
  RESULTS
  In the essential oil of E. microtheca leaves, 101 compounds representing 100%, were identified. Among them, α-phellandrene (16.487%), aromadendrene (12.773%), α-pinene (6.752%), globulol (5.997%), ledene (5.665%), P-cymen (5.251%), and β-pinene (5.006%) were the major constituents. In the oil of E. microtheca flowers, 88 compounds representing 100%, were identified in which α-pinene (16.246%), O-cymen (13.522%), β-pinene (11.082%), aromadendrene (7.444%), α-phellandrene (7.006%), globulol (5.419%), and 9-octadecenamide (5.414%) were the major components. Sixty six compounds representing 100% were identified in the oil of E. viminalis leaves. The major compounds were 1, 8-cineole (57.757%), α-pinene (13.379%), limonene (5.443%), and globulol (3.054%).
  
  
  CONCLUSIONS
  The results showed the essential oils from the aerial parts of Eucalyptus species are a cheap source for the commercial isolation of α-phellandrene, α-pinene, and 1, 8-cineole compounds to be used in medicinal and food products. Furthermore, these plants could be an alternative source of insecticide agents.
authors.affiliation: Department of Chemistry, University of Sistan and Baluchestan, Zahedan, Iran.
authors.forename: Malek Taher
authors.initials: MT
authors.lastname: Maghsoodlou
authors.affiliation: Department of Agriculture, Shiraz University, Shiraz, Iran.
authors.forename: Nasrin
authors.initials: N
authors.lastname: Kazemipoor
authors.affiliation: Department of Biology, University of Sistan and Baluchestan, Zahedan, Iran.
authors.forename: Jafar
authors.initials: J
authors.lastname: Valizadeh
authors.affiliation: Department of Chemistry, University of Sistan and Baluchestan, Zahedan, Iran.
authors.forename: Mohsen
authors.initials: M
authors.lastname: Falak Nezhad Seifi
authors.affiliation: Department of Chemistry, University of Sistan and Baluchestan, Zahedan, Iran.
authors.forename: Nahid
authors.initials: N
authors.lastname: Rahneshan
keywords: Essential oil; Eucalyptus microtheca; Eucalyptus viminalis; GC/MS; Hydro-distillation; Myrtaceae