Artemisia vulgaris L. from Vietnam:: Chemical variability and composition of the oil along the vegetative life of the plant

Essential oils produced from a population of Artemisia vulgaris of Vietnamese origin cultivated near Hanoi were subjected to analysis by GC, GUMS and C-13-NMR. The oils were found to contain oxygenated monoterpenes as major components (1,8-cineole, camphor and alpha-terpineol). The composition of these oils differed from that previously reported for Vietnamese A. vulgaris oil. Only slight differences in the composition of the oil were observed along the Vegetative life of the plant. No significant difference was observed between compositions of leaf and flower oils. In addition, the combination of retention indices, GC/MS and C-13-NMR spectroscopy allowed the identification of unusual sesquiterpenes such as presilphiperfolan-9alpha-ol as a minor component.