Análisis SPME-GC-MS de compuestos orgánicos volátiles de flores de una especie cultivada en el sur del Ecuador

Abstract

Abstract: In this study, volatile compounds were identified using the HS SPME-GC technique in the species Lepechinia mutica, belonging to the Lamiaceae family and endemic to the Ecuadorian Andes. The species was identified in two seasons of the year; winter and summer, obtaining 107 volatile compounds from the flowers in winter and 74 in summer, the main compounds being (Z)-β-ocimene (18.04 ± 2.43%), (9-epi-(E)-caryophyllene) (14.23 ± 0.12%), among others. In the leaves, 105 volatile compounds were identified in winter and 73 in summer, the main ones being aromadendrene (26.45 ± 14.37%) and (Z)-β-ocimene (19.05 ± 8.93%). In the enantioselective analysis, a capillary column with 2,3-diethyl-6-tert-butyldimethylsilyl-β-cyclodextrin as a chiral selector was used; 9 enantiomers were identified, including α-thujene, sabinene, δ-3-carene, α-copaene identified as enantiomerically pure and (+)(-)α-pinene (42.58%), (+)(-)γ-terpinene (83.10%), (+)(-)δ-cadinene (35.54%), and (+)(-)α-muurolene (64.02%) as a racemic mixture. Several of these compounds possess therapeutic activities such as anti-inflammatory, antioxidant, antibacterial, anticancer, antifungal, and antidepressant properties. This highlights the importance of continuing to investigate this species to develop new drugs based on its medicinal properties.