Chemical polymorphism of the essential oil of Thymus carnosus from Portugal
1995
Salgueiro, L. | Vila, R. | Tomas, X. | Tomi, F. | Canigueral, S. | Casanova, J. | Proenca da Cunha, A. | Adzet, T.
The composition of the essential oils of 11 populations of Thymus carnosus from Portugal and their infraspecific variability were investigated by GC, GC-MS and 13CNMR. The results obtained were submitted to Principal Component and Chemometric Cluster Analyses. Borneol was the main constituent in all the populations except in one, which had a high content of linalool. This compound showed high percentages in samples originating from the region of Estremadura. Multivariate analysis allowed the distinction between three different groups of essential oils, (i) borneol/cis-sabinene hydrate/terpinen-4-ol, (ii) linalool/borneol/trans-sabinene hydrate and (iii) borneol/camphene.
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