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Determining the Polyphenol Complex in Reynoutria japonica Houtt. by the Tandem Mass Spectrometry Method

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Abstract

The purpose of this work was to clarify the metabolomic composition of extracts, in particular, the presence of a polyphenol complex in extracts of the medicinal plant Reynoutria japonica Houtt., belonging to the family Polygonaceae. Leaf and stem tandem mass spectrometry was used to identify target analytes in the extracts. A total of 31 chemical compounds have been identified, of which 18 compounds represent a polyphenolic complex. In addition to the identified secondary metabolites, some compounds were discovered for the first time, in particular, polyphenolic compounds: dihydrochalcone aspalathin, coumarin umbelliferone, lignan syringaresinol, as well as the flavones formononetin and gardenin B.