Ferrari, BernardCastilho, PaulaTomi, FélixRodrigues, Ana IsabelCosta, Maria do CéuCasanova, Joseph2021-04-092021-04-092005Ferrari, B., Castilho, P., Tomi, F., Rodrigues, A. I., do Ceu Costa, M., & Casanova, J. (2005). Direct identification and quantitative determination of costunolide and dehydrocostuslactone in the fixed oil of Laurus novocanariensis by 13C‐NMR spectroscopy. Phytochemical Analysis: An International Journal of Plant Chemical and Biochemical Techniques, 16(2), 104-107.http://hdl.handle.net/10400.13/3269The fixed oil of Laurus novocanariensis (previously L. azorica) contains mostly glycerides together with minor non-saponifiable compounds. The direct identification and quantitative determination of costunolide and dehydrocostuslactone, two sesquiterpene lactones components of the oil that exhibit biological activities, is described. The analysis was carried out using 13C-NMR spectroscopy (signal acquisition with inverse gated decoupling of protons; diglyme as internal standard) without separation, derivatisation or any sample preparation.eng13C-NMRQuantificationCostunolideDehydrocostuslactoneLaurus novocanariensisL. azorica.Faculdade de Ciências Exatas e da Engenhariajournal article10.1002/pca.825