Polymorphism of essential oils in thyme species growing in European part of North-East Russia and Ural

Essential oils of thyme species growing in the European part of North-East Russia and Ural were shown to contain azulene, trans-isopropyl-1-methyl-2-cyclohexene-1-ol, trans-4,5-epoxycarane, 1,3,5-tri-methylene cycloheptane, eudesm-7(11)-en-4-ol, and isoaromadendrene epoxide. Detection in the plants of the genus Thymes of uncharacteristic compounds could be accounted for by the beginning of investigation of earlier unexplored species or by the biosynthesis of these compounds induced by environmental conditions. All species of the genus Thymus growing in the European part of North-East Russia and Ural (T. hirticaulis, T. talijevii, T. paucifolius, T. guberlinensis, and T. punctulosus) belong to nonphenolic chemotype characteristic of the way of their adaptation to low temperatures. In three species (T. talijevii, T. paucifolius, and T. punctulosus), essential oils were rich in bicyclic sesquiterpenes.