title: Essential oils composition of croton species from the Amazon.
abstract: The essential oils of leaves and twigs from the Euphorbiaceous Croton draconoides, C. urucurana and Julocroton triqueter were obtained and analyzed by GC and GC-MS. In total, 101 volatile constituents were identified, comprising an average of 90% of the oil, mostly made up of mono- and sesquiterpenes. The monoterpene hydrocarbons varied from 1.2 to 40.2%, the sesquiterpene hydrocarbons from 34.0 to 49.6% and the oxygenated sesquiterpenes from 11.5 to 51.3%. The main compounds found in the oil of C. draconoides were beta-pinene (16.9%), alpha-pinene (16.5%), curzerene (12.8%), germacrene D (9.0%), gamma-elemene (4.7%), and elemol (4.4%). The oil of C. urucurana showed sesquicineole (23.0%), dehydro-sesquicineole (13.8%), beta-caryophyllene (7.9%), beta-bisabolol (5.0%), germacrene D (4.2%) and beta-elemene (4.1%) as the chief compounds. The oil of J. triqueter was dominated by beta-caryophyllene (16.3%), beta-phellandrene (10.2%), spathulenol (5.1%), caryophyllene oxide (5.0%), delta-cadinene (4.3%), (E)-nerolidol (4.3%), and alpha-copaene (4.1%).
authors.affiliation: Program de Pós-Graduação em Química, Universidade Federal do Pará, 66075-900 Belém, PA, Brazil.
authors.forename: Nathalie A
authors.initials: NA
authors.lastname: Turiel
authors.affiliation: Program de Pós-Graduação em Química, Universidade Federal do Pará, 66075-900 Belém, PA, Brazil.
authors.forename: Alcy F
authors.initials: AF
authors.lastname: Ribeiro
authors.affiliation: Núcleo de Química, Universidade Federal do Tocantins, 77402-970 Gurupi, TO, Brazil.
authors.forename: Elisangela Elena N
authors.initials: EE
authors.lastname: Carvalho
authors.affiliation: lnstituto Federal de Educação, Ciência e Tecnologia, 77021-090, Palmas, TO, Brazil.
authors.forename: Vanessa D
authors.initials: VD
authors.lastname: Domingos
authors.affiliation: Departamento de Ciências Naturais, Universidade do Estado do Pará, 66113-200 Belém, PA, Brazil.
authors.forename: Flávia Cristina A
authors.initials: FC
authors.lastname: Lucas
authors.affiliation: Coordenação de Botânica, Museu Paraense Emílio Goeldi, 66040-170 Belém, PA, Brazil.
authors.forename: Léa Maria M
authors.initials: LM
authors.lastname: Carreira
authors.affiliation: Program de Pós-Graduação em Química, Universidade Federal do Pará, 66075-900 Belém, PA, Brazil.
authors.forename: Eloisa Helena A
authors.initials: EH
authors.lastname: Andrade
authors.affiliation: Program de Pós-Graduação em Química, Universidade Federal do Pará, 66075-900 Belém, PA, Brazil.
authors.forename: José Guilherme S
authors.initials: JG
authors.lastname: Maia
mesh_terms: D001938:Brazil; D029802:Croton / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D009822:Oils, Volatile / Q000737:chemistry*; D013045:Species Specificity
chemical_list: D009822:Oils, Volatile