The change of the essential oil composition of the thoroughwax (Bupleurum scorzonerifolium L.) growing in the Siberian region depending on meteorological conditions

The essential oil component composition of the thoroughwax (Bupleurum scorzonerifolium L.) elevated part that was recorded by the author during the research of 2009-2014 is considered in the article. It is noted that the qualitative structure of the essential oil main components in different years remains constant though their quantitative content changes. In the process of the weather condition extreme-nessgrowth the increased contentof sesquiterpenesand oxygen-containing connections in the oil structure is observed.