The Determination of Secondary Metabolites of Kamchatka Honeysuckle Lonicera caerulea var. kamtschatika Sevast.

For the first time, a comprehensive analysis of polyphenolic compounds in extracts of Kamchatka honeysuckle berries (Lonicera caerulea var. kamtschatica Sevast.) was carried out. We used 5 samples of wild honeysuckle and one variety sample Elena from the collection of the Kamchatka Research Institute of Agriculture. High-resolution tandem mass spectrometry was used to identify target analytes in the extracts. 58 polyphenolic compounds corresponding to the Caprifoliaceae family have been identified. Among the identified analytes, some compounds were determined for the first time: flavones—hydroxy genistein, diosmetin O-hexoside, chrysoeriol-O-diglucoside; flavanols—herbacetin, myricetin, astragalin, taxifolin-O-hexoside, rhamnocitrin; flavan-3-ols—epiafzelechin, epicatechin-O-hexoside, epigallocatechin-epicatechin dimer; phenolic acids—hydroxyferulic acid, hydroxy methoxy dimethylbenzoic acid, neochlorogenic acid, ellagic acid; stilbenes—pinosylvin, resveratrol and many other polyphenols. The richest in the content of polyphenolic compounds was the wild form variety nos. 5–23 polyphenolic compounds, followed by the Elena variety—21 polyphenolic compounds.