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The essential oils from five samples of leaves of Rhododendron aureum from the Irkutsk region, Pribaikal'e, Russian Federation, were isolated by hydrodistillation and analyzed by a combination of GC and GC/MS. Compounds representing 70.5-78.3 % of the oils were identified. Twenty-seven compounds were identified according to their chromatographic retention indices and mass spectra. The major components of the oils were calarene (10.4- -66.4 %), ?-bourbonene (0.5-27.4 %), ?-selinene (2.1-8.0 %) and kaur-16-ene (2.0-6.3 %). It was found that the chemical composition of Rh. aureum essential oil depends on the altitude of the growing plants.
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Оленников et al. (2010) studied this question.
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