Investigation of the chemical composition of larch wood resin

Quantitative, qualitative, and group composition of resinous substances from the heartwood of larch (Larix sibirica Ledeb.), which are by-products of dihydroquercetin production, have been analyzed using highperformance liquid and gas chromatography. Isocembrol, a diterpene compound possessing the properties of a plant growth-regulating hormone, has been detected for the first time among the extractable substances from larch biomass. The chemical composition of the resinous substances implies high biological activity of the product analyzed and can be used to determine the areas of practical application of this product.