Essential Oils from Eugenia Species-Part VII:Sections Phyllocalyx and Stenocalyx

摘要

The chemical composition of the leaf oils obtained by hydroistillation of eight Eugenia species,collected in southern Brazil,was analyzed by GC and GC/MS.Eugenia speciosa oil is characterized by large amounts of monoterpene hydrocarbons with alpha-pinene (47.3%) and limonene (23.0%) as major constituents,while E.cuprea oil is composed of 78.6% sesquiterpenes,Spathulenol (12.1%) was the major component,followed by beta-caryophyllene (9.2%) and carophyllene oxide (8.7%).Eugenia arenosa was dominated by the acyclic sesquiterpene,farnesyl acetate (70.4%) and aromadendrene (11.7%).Eugenia brasiliensis,E,multicostata,E.sulcata and E.xiriricana oils possessed very similar chemical compositions.In the monoterpene fraction,alpha- and beta-pinene were the major components (a total of 40.7%,23.4%,35.9% and 21.9%,respectively),while for E.pitanga (E)-beta-ocimene (10.5%) was the major component.For the sesquiterpene fraction,spathulenol and globulol were the major components (a total of 10.5%,19.4%,18.8% and 24.0%,respectively).In contrast,the oil of E.pitanga was characterized in this fraction by germacrene D and bicyclogermacrene (29.3% and 22.4%,respectively).