VARIATIONS OF THE CHEMICAL COMPOSITION OF EXTRACTIVE KIDNEYS OF THE KIDNEYS BERES OF ST. PETERSBURG AND THE LENINGRAD REGION

Abstract

The article is devoted to the differences in the composition of extractive substances of vegetative buds of birch trees in St. Petersburg and the Leningrad region and its change. Buds of birch (Betulae gemmae) are a medicinal product and are included in the state register of medicines. The substances soluble in acetone were studied by chromatography-mass spectrometry method after preliminary methylation with diazomethane. The retention indices of the identified compounds are given. Earlier, the structure of compounds was established by methods of NMR spectroscopy.Birch buds from the surveyed areas contain sesquiterpenoids and flavonoids. These components correspond to the classical notions of the composition of the buds. However, specimens of birch trees were found containing only triterpenoids and fatty acids in the buds, and also a combination of all the listed compounds - the intermediate composition. This tendency was observed in the Betula pendula Roth. birch, Betula pubescens Ehrh., Betula pendula var. carelica Merckl., Betula krylovii G.V.Krylov in the arboretum of the St. Petersburg Forestry University and observed on the Betula pendula and, Betula pubescens in St. Petersburg and the Leningrad region. Presumably one type of chemical composition can be replaced by another in time. The change in the composition was recorded for several years on specimens of birches.Various reasons for this phenomenon are discussed.