Chemical composition of the essential oil from aerial parts of Echinophora platyloba DC. from Iran

Essential oils and various extracts from plant are of great interests in the industry and scientific research. This study was designed to examine the chemical composition of essential oil and of Echinophora platyloba from Iran. The chemical composition of the hydrodistilled essential oil of the air-dried aerial parts of Echinophora platyloba growing wild in Iran was obtained by hydrodistillation and was analyzed by gas chromatography [GC] and gas chromatography-mass spectrometry [GC-MS]. The species is poor in essential oil [yield=0.7%]. Twenty-nine constituents representing 97.43% of total oil have been identified. The main constituents of the oil were found to be [Z]-beta-ocimene [26.71%], delta-3-carene [16.16%], Limonene [6.59%]. Other representative compounds were identified as Cis-3-hexylbenzoate [4.57%], Spathunenol [4.57%], Myristicin [4.48%], Myrcene [4.31%], 4-decanolide [4.2%] and alpha-Pinene [4.03%]. The oil of Echinophora platyloba consists of 16 monoterpenoids [69.55%] and 5 sesquiterpenoids [7.08%]

Chemical composition of the essential oil from leaves and flowering aerial parts of Psammogeton canescens [DC.] Vake from Iran

The genus Psammogeton Edyew. which belong to the umbelliferae family, is found in central areas of Asia. This genus consists of six species widespread in the sandy dunes of deserts. Among the four species present in Iran, Pssamogeton canescens [DC.] vatke is distributed in regions of Iran central. The aim of this study is to determine the chemical composition of essential oil of Psammogeton canescens. The essential oil was extracted by hydrodistillation of dried aerial part of plant and analysed by GC and GC/MS. Thirty constituents representing 99.7% of total oil have been identified. The main constituents of the oil were found to beta-bisabolene [33.35%], Apiole [28.34%], alpha-Pinene [11.86%] and Dill apiole [8.17%]. Other representative compounds were identified beta-Pinene [2.68%], Myrcene [2.62%] and sylvestrene [2.42%]. Amounting to 99.7% of the total oil, the sesquiterpene hydrocarbons and oxygenated sesquiterpene had the highest contribution [78.16%], these fractions dominated by micro sign bisabolene [33.35%], followed by Apiole [28.34%] and Dill apiole [8.17%]. The diterpene was very poor; it represented [0.49%], it is found to contain only a few percent of cembrene [0.49]