Extraction of coumarins from natural sources for use in the synthesis of complexes of lanthanides

The paper shows the possibility of using the technique of G. K. Nikonov for the extraction of coumarin derivatives from plant material of wild and cultivated plants. The received extracts were confirmed with mass spectra obtained on chromatographic quadrupole mass spectrometer with application of a method of ionization by electrodispersion. On the basis of the conducted researches authors drew a conclusion on a possibility of use of a technique of G. K. Nikonova who allows to carry out release of benzopyrones quite effectively.