Composition of the essential oil of Hymnocrater platystegius in Iran

Abstract

The major constitutents were α-pinene (10.5%) and sabinene (10.5%) in sample A, spathulenol (35.4%) and abietatriene (13.4%) in sample B, and β-caryophyllene (32.8%) and caryophyllene oxide (16.1%) in sample C [5]. Our study deals with the analysis of the essential oil isolated from aerial parts of Hymenocrater platystegius Rech. f., which grows wild in Iran. The composition of the oil of the aerial parts of H. platystegius is shown in Table 1, which lists the percentage yields of the components found, as well as their retention indices. As can be seen, seventeen components representing 90.7% of the aerial parts oil of H. platystegius were identified. The major components of the oil were α-pinene (23.4%) and limonene (23.2%). The other sizable component was β-pinene (11.7%). These results can be compared to those for the oil of H. incanus (from Iran), namely, β-caryophyllene (17.6%) and 1,8-cineole (16.9%). As also can be seen from Table 1, the monoterpene hydrocarbon fraction in the oil of aerial parts of H. platystegius contains six compounds comprising 64.8%. In addition, three oxygenated monoterpenes account for 4.3% of the essential oil, and eight sesquiterpene hydrocarbons account for 21.6%.