Abstract
The work is devoted to the phytochemical study of the leaves of various species of the genus Syringa. They are promising sources of raw material containing flavonoids. The leaves of S. vulgaris, S. josikaea, S. amurensis, S. microphylla, S. villosa and S. sweginzovii were selected for the experiment. Rutin was found in the studied extracts of lilac leaves. The bathochromic shift of the long-wave band in the UV spectra of the solutions of the studied extracts indicates the presence of flavonoids. Under the conditions of differential spectrophotometry, the maximal absorption was detected at the range of 406-412 nm of plant raw material. The total flavonoids at the wavelength of 412 nm calculated on rutin in all the studied samples varies from 1.43% to 2.92%.
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