The research of the component composition of fatty acids of the aerial parts of Leonurus deminutus V.I. Kreсz.

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Abstract
Aim – study of the fatty acid composition of the aerial parts of L. deminutus. Material and methods. The objects of the study were samples of the aerial parts of L. deminutus harvested on the territory of the Irkutsk region during the mass flowering period (July 2021). The analysis of the fatty acid composition of raw materials of L. deminutus was carried out by Gas chromatography/Mass spectrometry (GC/MS) on the Agilent Technologies 5973/6890N MSD/DS device in 3 repetitions. The relative content of each fatty acid was determined as a percentage by weight of the total amount of fatty acids in the plant raw material (internal normalization method). The absolute content of fatty acids was calculated by the internal standard method. Results. The component composition of the fatty acids of the aerial parts of L. deminutus was studied, 14 compounds were identified, of which 8 saturated fatty acids (5.10±0.12 mg/g) and 6 unsaturated fatty acids (13.41±0.25 mg/g). Palmitic acid (3.41±0.07 mg/g) and stearic acid (0.88±0.02 mg/g) prevail among saturated fatty acids. The dominant compounds among unsaturated fatty acids are linoleic (7.78±0.14 mg/g), α-linolenic (2.21±0.04 mg/g) and oleic (2.19±0.04 mg/g) acids. Conclusion. The qualitative composition of fatty acids in the aerial parts of L. deminutus has been studied for the first time, their quantitative content has been established. L. deminutus is promising for use in medical practice and can be recommended as an additional source of linoleic and α-linolenic acids essential for humans.

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