title: The chemical composition of hexane extract from bark of Juniperus brevifolia.
abstract: The phytochemical analysis of the bark of Juniperus brevifolia was undertaken for the first time. The GC-MS analysis of the hexane extract from bark of "cedro-do-mato" (J. brevifolia) allowed to identify three rare compounds for the first time in Juniperus genus: 6,7-dehydroferrugin-12-methyl ether, 11-hydroxy-6,7-dehydroferruginol and 6,7-dehydrohinokiol. The results also showed that the chemical composition of the extract were essentially abietane-type diterpenoids with alcohol function (44.9%) and with carbonyl function (8.6%). Fatty acids such palmitic, oleic, stearic and docosanoic acids were the second most abundant family of identified compounds (9.5%) and its value increased (12.7%) after alkaline hydrolysis, mainly due to docosanoic and tetradocosanoic acids. Sterols like sitosterol and stigmast-4-en-3-one, were also present (6.6%), along with esters of sterols (8.4%). Significant quantities of the long-chain aliphatic alcohols (ca 3.7%) were identified in the hexane extract only after alkaline hydrolysis.
authors.affiliation: Department of Technologic Sciences and Development, University of Azores, 9501-801 Ponta Delgada, Azores, Portugal.
authors.forename: A M L
authors.initials: AM
authors.lastname: Seca
authors.forename: A M S
authors.initials: AM
authors.lastname: Silva
mesh_terms: D004224:Diterpenes / Q000737:chemistry; D005227:Fatty Acids / Q000737:chemistry; D006586:Hexanes / Q000737:chemistry*; D018653:Juniperus / Q000737:chemistry*; D015394:Molecular Structure; D024301:Plant Bark / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry*; D013261:Sterols / Q000737:chemistry
chemical_list: D004224:Diterpenes; D005227:Fatty Acids; D006586:Hexanes; D010936:Plant Extracts; D013261:Sterols; C026385:n-hexane