title: Essential oil composition of Teucrium divaricatum Sieb. ssp. villosum (Celak.) Rech. fil. growing wild in Lebanon.
abstract: Teucrium divaricatum Sieb. ssp. villosum (Celak.) Rech. fil. is a medicinal plant used in Lebanon. The hydrodistillation of the aerial parts of T. divaricatum yielded 0.27% (wt/wt) of essential oil; gas chromatography and gas chromatography/mass spectrometry analysis enabled the identification of 60 compounds representing 94.5% of the total oil. On the whole, the oil was constituted mainly by sesquiterpenes (64.6%), particularly sesquiterpene hydrocarbons (50.0%). The most abundant compounds were (E)-caryophyllene (30.1%) and caryophyllene oxide (6.1%). The in vitro activity of the essential oil against some microorganisms in comparison with gentamicin by the broth dilution method was determined. The oil exhibited a good activity as an inhibitor of growth of Gram-positive bacteria.
authors.affiliation: Department of Chemistry of Natural Compounds, University of Naples Federico II, Naples, Italy.
authors.forename: Carmen
authors.initials: C
authors.lastname: Formisano
authors.forename: Francesco
authors.initials: F
authors.lastname: Napolitano
authors.forename: Daniela
authors.initials: D
authors.lastname: Rigano
authors.forename: Nelly Apostolides
authors.initials: NA
authors.lastname: Arnold
authors.forename: Franco
authors.initials: F
authors.lastname: Piozzi
authors.forename: Felice
authors.initials: F
authors.lastname: Senatore
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology; D002849:Chromatography, Gas; D008401:Gas Chromatography-Mass Spectrometry; D007861:Lebanon; D009822:Oils, Volatile / Q000737:chemistry* / Q000494:pharmacology; D035261:Plant Components, Aerial / Q000737:chemistry; D010946:Plants, Medicinal; D000081223:Polycyclic Sesquiterpenes; D012717:Sesquiterpenes / Q000032:analysis; D031367:Teucrium / Q000737:chemistry*
chemical_list: D000900:Anti-Bacterial Agents; D009822:Oils, Volatile; D000081223:Polycyclic Sesquiterpenes; D012717:Sesquiterpenes; C024714:caryophyllene