## 3 Results
subina var._ \\  & & & **T****axa\({}^{\dagger}\)** & & & & \\ \hline \multicolumn{6}{c}{Phenylic acids [ng/mg Del]} \\ \hline Galile & RQL & RQL & RQL & RQL & RQL & RQL & RQL \\ Protoextebnic & 26.75 \(\pm\) 0.11\({}^{\rm h}\) & 43.30 \(\pm\) 0.21\({}^{\rm a}\) & 42.65 \(\pm\) 0.78\({}^{\rm a}\) & 27.35 \(\pm\) 0.28\({}^{\rm b}\) & 44.03 \(\pm\) 0.18\({}^{\rm a}\) & RQL & 26.85 \(\pm\) 0.00\({}^{\rm b}\) \\ +4 fy-drosyncratic & 0 & 0 & RQL & RQL & 0 & 0 \\ \(p\)-counter & RQL & RQL & 5.95 \(\pm\) 0.07\({}^{\rm a}\) & RQL & 11.63 \(\pm\) 0.04\({}^{\rm a}\) & RQL \\ Salicylic & 0 & RQL & RQL & 0 & RQL & RQL & 0 \\ \hline \multicolumn{6}{c}{Flavoroid adjosomes [ng/mg Del]} \\ \hline Catechin & 2227.50 \(\pm\) 3.54\({}^{\rm a}\) & 1013.00 \(\pm\) 2.83\({}^{\rm d}\) & 1727.50 \(\pm\) 3.54\({}^{\rm a}\) & 1530 \(\pm\) 7.0\({}^{\rm d}\) & 1822.50 \(\pm\) 10.61\({}^{\rm b}\) & 1295.25 \(\pm\) 6.72\({}^{\rm a}\) & 1992.00 \(\pm\) 11.31\({}^{\rm c}\) \\ Tascithin & RQL & 5.63 \(\pm\) 0.18\({}^{\rm a}\) & 6.25 \(\pm\) 0.21\({}^{\rm a}\) & 0 & 111.03 \(\pm\) 0.32\({}^{\rm a}\) & 0 \\ Myrcatin & RQL & RQL & 0 & RQL & RQL & 0 \\ Latteolin & RQL & RQL & 1.78 \(\pm\) 0.01\({}^{\rm d}\) & RQL & 382.41 \(\pm\) 0.3\({}^{\rm a}\) & 1.41 \(\pm\) 0.04\({}^{\rm d}\) & RQL \\ Eriderylol & 0 & 0 & RQL & RQL & 0 & 0 \\ Quercetin & RQL & 4.68 \(\pm\) 0.03\({}^{\rm a}\) & 1145.00 \(\pm\) 0.71\({}^{\rm d}\) & 5.69 \(\pm\) 0.02\({}^{\rm a}\) & 290.55 \(\pm\) 0.21\({}^{\rm a}\) & RQL & RQL \\ Apigenin & 8.15 \(\pm\) 0.28\({}^{\rm m}\) & 18.35 \(\pm\) 0.35\({}^{\rm a}\) & 29.88 \(\pm\) 0.39\({}^{\rm a}\) & 23.33 \(\pm\) 0.39\({}^{\rm a}\) & 58.88 \(\pm\) 1.59\({}^{\rm a}\) & 12.63 \(\pm\) 0.04\({}^{\rm d}\) & 29.83 \(\pm\) 0.39\({}^{\rm a}\) \\ \hline \multicolumn{6}{c}{Flavoroid glycocalies [ng/mg]} \\ \hline Quercetin-3-O-ruttinoside (Ratin) & RQL & 0 & 2258.00 \(\pm\) 2.12\({}^{\rm a}\) & 1055.50 \(\pm\) 1.41\({}^{\rm a}\) & 2237.50 \(\pm\) 0.70\({}^{\rm b}\) & 95.75 \(\pm\) 1.77\({}^{\rm a}\) & 882.50 \(\pm\) 0.161\({}^{\rm c}\) \\ Hyperoside & 0 & 333.3 \(\pm\) 0.14\({}^{\rm a}\) & 0 & RQL & 0 & 0 \\ Latteolin-7-O-glucoside & 28.50 \(\pm\) 0.07\({}^{\rm b}\) & 5.83 \(\pm\) 0.18\({}^{\rm b}\) & 19. As a result of the comparative LC-ESI-MS/MS analysis of the best antioxidant extracts, catechchin was revealed as the abundant flavonoid aglycone (1013.00-2227.50 ng/mg DE), with the highest amount found in the _J. ashei_ leaves extract. The contents of other individual aglycones (apigenin, quercetin, luteolin, taxifolin, myricetin and eriodictylol) were much lower (to 114.50 ng/mg). It can be noticed that in the case of the studied juniper samples, the total aglycone contents and profiles are species-specific. The greatest differentiation was observed in phenolic glycosides. The highest amount of these metabolites was determined in the leaves of _J. communuis_, _J. sibrica_, _J. [PERSON]_, and _J. [PERSON]_. In the case of _J. [PERSON]_ and _J. pinchtii_, glycosides represented a relatively small portion of all polyphenols. Quercetin derivatives (e.g., rutin, isoquercetin, quercetin) were found to be predominant reaching concentrations \(\geq\)2375.00 ng/mg. Rutin was the major flavonoid glycoside in _J. communuis 'Laxa'_ and _J. sibrica_, while quercitrin was dominant in _[PERSON]. [PERSON]_, _[PERSON]. [PERSON]_, and _[PERSON]. [PERSON]_ var. _balkanensis_. Several other glycosides including luteolin, kaempfer, isorhamentin, apigenin, and naringenin derivatives were detected in the samples. However, _J. ashei_ and _J. pinchtii_ extracts did not have isorhamentin glycosides and there was only a trace amount of one kaempfer glucoside (astragalin). In addition to the above-mentioned and confirmed analytes, some isobars of naringenin 7-glucose, apigenin-7-glucose, isorhamentin-3-glucoside, astragalin, luteolin-7-glucose, kaempferol-3-rutinoside, kaempferol, quercetin, naringenin, myricetin, catechchin, and isorhamentin were detected during LC-MS analyses. However, their reliable identification could not be performed.