Análisis químico y enantiomérico de la fracción volátil destilada de la especie Lepechinia heteromorpha Briq. (Lamiaceae)

Abstract

Abstract :In the present investigative work, the chemical and enantiomeric composition of the essential oil of the species L. heteromorpha, obtained by steam distillation distillation, was studied. The optical activity was determined as the main physical property. The chemical composition was analyzed qualitatively and quantitatively by CG-EM and CG-FID respectively. The enantiomeric analysis was performed by gas chromatography with enantioselective column. The identification of 28 compounds was achieved, with aliphatic sesquiterpene hydrocarbons and aliphatic monoterpene hydrocarbons being the major groups with 47.46% and 26.47% respectively, and in a lesser proportion the sesquiterpene alcohol groups (22.27%), monoterpene ketone. (0.66%) and aromatic monoterpene hydrocarbons (0.56%). In turn, the major compounds were: Ledol (22.27%), Viridiflorene and (E, E);-Farnesene (21.95%), Limonene and -Felandrene (13.62%), Canfeno (5, 87%), Spirolepechineno (5.65%), (E)-Cariofilene (5.63%) and Allo-aromadendrene (4.33%). In the enantiomeric analysis, the enantiomeric ratio of 3 components was determined; they are:-pinene,-phellandrene and camphor. In addition, by means of CCF and CC techniques, as well as NMR, two sesquiterpenes were isolated: Ledol and caryophyllene oxide.