globulol and cadinol

The essential oils from three organs (i.e. flowers, leaves and stems) of wild Lindera chunii Merr. in Dinghu Mountain (China) were obtained by microwave-assisted hydrodistillation. The essential oils were analysed by gas chromatography with flame ionisation detection and gas chromatography with mass spectrometry. The yields of essential oil varied from 0.06% to 0.59% and showed a remarkable variation among the plant organs. A total of 43 compounds accounting for 95.4-96.3% of the total essential oil were identified, and the major compounds were germacrene B (0.7-43.2%), viridiflorene (trace to 14.6%), globulol (6.3-11.6%), α-cadinol (1.7-8.6%) and τ-cadinol (0.5-7.3%). This study shows that the chemical compositions of the essential oils from the different organs of L. chunii are very variable.

Topics: Flowers; Gas Chromatography-Mass Spectrometry; Lauraceae; Oils, Volatile; Plant Leaves; Plant Stems; Sesquiterpenes; Terpenes

This study is designed to examine the chemical composition of the essential oil and antioxidant activities of the different extracts of Tanacetum sonbolii Mozaff. from Iran for the first time. The essential oil was isolated by hydrodistillation and its gas chromatography and gas chromatography-mass spectrometry analyses resulted in the identification of 26 components, representing 96.5% of the oil. The major components were characterised to be α-cadinol (35.3%), globulol (20.1%) and 1,8-cineole (8.6%). Antioxidant activities of the various extracts of the plant were determined by two different test systems; 1,1-diphenyl-2-picrylhydrazyl (DPPH) and β-carotene-linoleic acid. Also, their total phenolic and flavonoid contents were determined. DPPH radical-scavenging activities of test samples followed the order water > chloroform > ethyl acetate > butanol > BHT > methanol. Moreover, the ethyl acetate extract showed better β-carotene bleaching capacity than the other extracts and the amount of total phenolics was very high in ethyl acetate extract.

Topics: Antioxidants; beta Carotene; Biphenyl Compounds; Chloroform; Cyclohexanols; Eucalyptol; Flavonoids; Gas Chromatography-Mass Spectrometry; Iran; Methanol; Monoterpenes; Oils, Volatile; Phenols; Picrates; Plant Extracts; Plant Oils; Sesquiterpenes; Tanacetum; Terpenes

The hydrodistillated leaf essential oil of Machilus pseudolongifolia was analyzed to determine its composition and yield. Seventy compounds were identified, the main components being beta-eudesmol (26.8%), alpha-cadinol (20.8%), viridiflorene (8.9%), alpha-caryophyllene (5.3%), globulol (4.6%) and beta-caryophyllene (4.2%). Oxygenated sesquiterpenes (60.1%) and sesquiterpene hydrocarbons (31.4%) were the predominant groups of compounds. The leaf oil exhibited excellent antimicrobial and anti-wood-decay fungal activities.

Topics: Anti-Infective Agents; Fungi; Lauraceae; Oils, Volatile; Plant Leaves; Polycyclic Sesquiterpenes; Sesquiterpenes; Sesquiterpenes, Eudesmane; Taiwan; Terpenes; Wood