Conducted a comparative study of the phenolic compounds content, as well as the qualitative and quantitative composition of flavonoids and isoflavonoids are 8 species of clover (Trifolium L.) flora of Siberia with the purpose of identifying the most promising species as sources of biologically active complexes.It is established that the amount of phenolic compounds in the aerial part of Trifolium pratense L, T.hybridum L., T. arvense L, T. repens L., T.montanum L., T. medium L., T. aurea (Pollich) Green, T. lupinaster L. is of 2,37–3,78%. The content of flavonoids in the samples changed from 1,91 to 3,78 %. By the method of chromatography on paper and thin-layer chromatography to be closest in composition of flavonoids (rutin, quercetin and cynaroside) to the T. pratense L are T.montanum L., T. medium L., T. lupinaster L. and T. aurea (Pollich) Green. The content of isoflavones in the aerial part of the clover species flora of Siberia ranged from 0,27 to 2,58%. The most promising are the T. medium L., T. repens L. and T.hybridum L.. Formononetin, biochanin, genistein, ononin were identified in the composition of these species by chromatographic comparison with standard samples. Trifolium pratense L, T.hybridum L., T. lupinaster L., T. medium L. with sufficient raw material base in the flora of Siberia can be recommended for further study as sources of flavonoids, including isoflavonoids.

Spiraea hypericifolia L. is affiliated with the section Chamaedryon Ser. of the genus Spiraea L. (Rosaceae). Similar to many other Spiraea species, S. hypericifolia most often accumulates flavonols among other flavonoids, in particular quercetin and its derivatives. An ethanol–water extract from the aerial part of S. hypericifolia collected in the vicinity of the Ilyichovo settlement (Krasnoyarsk Krai, Russia) was analyzed by liquid chromatography with high-resolution mass spectrometry. Primary and secondary metabolites were found in the extract; structural interpretation consistent with quercetin and its derivatives was proposed for 10 of them. Major compounds were various glycosides of quercetin containing glucose (four compounds), galactose (one compound), xylose (two compounds), arabinose (one compound), or rutinose (one compound) as a carbohydrate residue. Isorhamnetin and 3-O-methylquercetin-3′-O-β-D-glucopyranoside were identified among methyl-containing compounds. The latter compound and reynoutrin, rhamnetin-3-O-β-D-xylopyranosyl-β-D-glucopyranoside, and quercetin-3-O-(6″-O-malonyl)-β-D-glucoside have not been previously found in S. hypericifolia. Data on the presence of quercetin and its derivatives in the extract of S. hypericifolia expand the understanding of the possible practical use of this plant. In addition, the microscopic features of S. hypericifolia leaves were studied. The diagnostic features of the leaf blade necessary for the authentication of raw materials were revealed: straight-walled epidermis cells, stomata located on both sides of the leaf blade (amphistomatic type), two types of trichomes, and wrinkled cuticula with nodi. The main anatomical diagnostic features of the leaves of S. hypericifolia were determined, which makes it possible to assess the authenticity of the raw material.

Black chokeberry is an official drug raw material and is used as a multivitamin drug. Black chokeberry guarantees the supply of raw materials as it grows all over the Russian Federation end is a promising sourse of phenolic compounds for new drugs. Objective: to develop the most favorable conditions for extraction of bioactive compounds from black chokeberry and to assess its anti-metastatic activity. To extract bioactive compounds from black chokeberry the method of multistep repercolation with completed cycle was used. To assess the factors controlling the raw material extraction the technique of mathematic simulation for latin square. The technique of liquid anthocyanins and catechins rich black chokeberry extraction was given with the following parameters: extragent – 95% acidified alcohol, phase relation – 1 : 5, number of percolators – 5. The content of biologically active substances in the extract obtained with 95% acidified ethyl alcohol was determined by conventional methods. In the composition of the extract, the content of anthocyanins (5.83±0.25%), catechins (0.22±0.02%), tannins (4.65±0.30%), phenolic acids (0.27±0.01%) and other biologically active substances was determined. To assess the antitumor properties of the chokeberry fruit extract, the Lewis lung carcinoma model was used. It was found that the proposed extract reliably inhibits the development of metastases and increases the antimetastatic activity of cyclophosphamide in combined treatment, is of interest as a means for increasing the effectiveness of tumor chemotherapy.