title: METHOD OF QUANTITATIVE DETERMINATION OF THE AMOUNT OF PHENYLPROPANOIDS IN THE RAW MATERIALS OF THE LETTER
abstract: The dried herb of the letter officinalis (Betonica officinalis, sem. Clear–flowered - Lamiaceae). The raw materials of the letter letter grown in the Penza region were studied. The purpose of this work is to determine the amount of phenylpropanoids in the herb of the letter by spectrophotometry. The quantitative determination of the amount of flavonoids in the herb of the letter by differential spectrophotometry was carried out. The presence of phenylpropanoids was confirmed by differential spec
journal: chemistry of plant raw material