Abstract
Aqueous acetone-soluble phenolic glucosides, phenolic aglycones and triterpenoic components were extracted from winter-dormant Betula pendula twigs. The chemical composition was analyzed using gas chromatography for triterpenoids and most phenolics and high-performance liquid chromatography with ultraviolet—visible detection for phenolics, especially for platyfylloside. Gas chromatography—mass spectrometry and thermospray high-performance liquid chromatography—mass spectrometry were used for complete identification and structural elucidation. The analysis revealed five new components, salidroside, dehydrosalidroside, catechin pentoside, an isomer of catechin and deacetylpapyriferic acid, which have not previously been reported in the twigs of this species.
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