Análisis químico y perfil enantiomérico de la fracción volátil destilada desde la especie ecuatoriana Gynoxys verrucosa Wedd

Abstract

Abstract:This study describes the chemical and enantiomeric analysis of the essential oil obtained by steam distillation and hydrodistillations of the aerial parts of the Gynoxys verrucosa Wedd (Family Asteraceae) endemic to Ecuador, collected in the province of Loja. Through the analysis by CG-MS and CG-FID allowed the characterization and quantification of 69 compounds, representing 76,26% of the total sample. The essential oil was composed mainly of hydrogenated sesquiterpenes (44,55%) and oxygenated sesquiterpenes (25,12%) and in smaller quantities by hydrogenated monoterpenes (1,46%) and oxygenates (2,69%), the most represeantative constituents were α-Zingibereno with 19,42%, ar-Curcumeno 17,69%. The CG enantioselective analysis of G. verrucosa revealed the presence of seven pairs of enantiomers, in addition to four chiral monoterpenoids and three enantiomerically pure chiral sesquiterpenoids.