MONOTERPENES, SESQUITERPENES AND FATTY ACIDS FROM JULOCROTON TRIQUETER (EUPHORBIACEAE) FROM CEARA - BRAZIL

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)In this study the volatile constituents from leaves and fruits of Julocroton triqueter (Lam.) Didr. (Euphorbiaceae), a medicinal plant from northwest Brazil, were investigated by GC/MS. Twenty one compounds, which represent about 96% of the total constituents of the essential oil, were identified. Caryophyllene oxide, humulene epoxide 11, trans-caryophyllene, occidentalol, alpha-humulene in the fruit and cis-carvyl acetate, spathulenol, cis-carveol, trans-caryophyllene, trans-carvyl acetate and alpha-humulene ill the leaves were the principal components. From one fraction of the hexane extract of the fruits a mixture of fatty acids were identified as: dodecanoic, tetradecanoic, hexadecanoic, 9-octadecenoic, cicosanoic, trieicosanoic and tetracosanoic acids. The partial analysis of the non-volatile constituents (hexanic fraction) from fruit allowed the isolation and characterization of tetracosan-1-ol (identify by (1)H and (13)C NMR, FTIR).5415557Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES

Composition and biological activity of essential oils from Lippia origanoides HBK

Analyses of the leaf oils from three colletions of Lippia origanoides H.B.K. by GC/MS and H-1- and C-13-NMR showed a similar chemical composition. Carvacrol (33.5-42.9%) was identified as the major component together with gamma-terpinene (8.0-10.5%), thymol (5.1-8.4%), methyl thymol (6.1-8.7%) and p-cymene (11.9-15.8%). In vitro evaluation of the oils showed significant antimicrobial activity against Escherichia coli, Staphylococus aureus, Staphylococus aureus MRSA, Candida albicans and Candida tropicalis.16550450