The chemical composition of the volatile compounds from the leaves of Galinsoga parviflora Cav. (Asteraceae) from Colombia was studied by GC and GC/MS. Eighty-eight volatile compounds were identified, of which the major ones were (Z)-3-hexen-1-ol (21.7%), β-caryophyllene (12.4%), and 6-demethoxy-ageratochrome (14%). The leaf oil presented antimicrobial activities against the Gram-positive bacteria Staphylococcus aureus and Bacillus cereus.
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