Abstract
The composition of the lipophilic components of the Adams rhododendron RhododendronadamsiiRehd. Acid and neutral components were identified using gas-liquid chromatography with mass spectrometric detection. Methyl tert-butyl ether (MTBE), which has all the advantages of diethyl ether, but is devoid of its disadvantages, was used as the raw material extractant. It does not form peroxides and does not create increased gas contamination due to its higher boiling point. As a result, comparison with databases identified triterpene, phenolcarboxylic and aliphatic acids with a chain length of 8 to 30 carbon atoms, including saturated, unsaturated and dibasic acids. More than 150 triterpene and aliphatic components of the unsaponifiable residue and acid fractions have been identified. Previously, unsaponifiable residues of lipophilic extracts were practically not studied. Only components of Rh.adamsiiand other species of the genus rhododendron essential oils have been studied in detail. For bioactivity testing, samples of the whole extract and its fractionation products were prepared. Some of the studied samples show inhibitory activity against the main protease of SARS-CoV-2.
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