germacrene-d and alpha-copaene

This study was designed to examine the chemical composition and anticholinesterase inhibitory activity of the essential oil of

Topics: Acetylcholinesterase; Annonaceae; Butyrylcholinesterase; Cholinesterase Inhibitors; Gas Chromatography-Mass Spectrometry; Malaysia; Oils, Volatile; Sesquiterpenes; Sesquiterpenes, Germacrane

This study was aimed to investigate the chemical compositions of the essential oils from Goniothalamus macrophyllus and Goniothalamus malayanus growing in Malaysia. The essential oils were obtained by hydrodistillation and fully characterized by gas chromatography (GC-FID) and gas chromatography-mass spectrometry (GC-MS). Analyses of the essential oils from G. macrophyllus and G. malayanus resulted in 93.6 and 95.4% of the total oils, respectively. The major components of G. macrophyllus oil were germacrene D (25.1%), bicyclogermacrene (11.6%), α-copaene (6.9%) and δ-cadinene (6.4%), whereas in G. malayanus oil bicyclogermacrene (43.9%), germacrene D (21.1%) and β-elemene (8.4%) were the most abundant components.

Topics: Cyclohexanones; Gas Chromatography-Mass Spectrometry; Goniothalamus; Oils, Volatile; Plant Leaves; Plants, Medicinal; Polycyclic Sesquiterpenes; Sesquiterpenes; Sesquiterpenes, Germacrane

The volatile profiles (VOC) and the essential oil (EO) composition from the aerial parts of Salvia broussonetii were analysed. Sesquiterpene hydrocarbons dominate the VOCs from leaves (95.7%) and flowers (67.6%), followed by monoterpene hydrocarbons (2.6 and 29.7%, respectively). The main common compounds are germacrene D, β-bourbonene, α-pinene, α-copaene and α-gurjunene, even if with divergent relative abundances. In the leaf EOs the sesquiterpenes prevail, even if not overwhelmingly (about 50.0%), followed by monoterpenes (23.0-35.0%) and by minor fractions of diterpene hydrocarbons and non-terpene derivates. The most abundant common compounds across the two sampling periods are α-pinene, β-pinene, isobornyl acetate, α-gurjenene, germacrene D and bifloratriene. A morphological characterisation of the trichomes responsible for the productivity in terpenes was also performed. Four different morphotypes were observed on the above ground organs of S. brussonetii: peltates and capitates of type II and III resulted the only producers of volatile substances.

Topics: Bicyclic Monoterpenes; Bridged Bicyclo Compounds; Flowers; Microscopy, Electron, Scanning; Monoterpenes; Odorants; Oils, Volatile; Plant Components, Aerial; Plant Leaves; Salvia; Sesquiterpenes; Sesquiterpenes, Germacrane; Trichomes; Volatile Organic Compounds