## 3 Results
\begin{table}
\begin{tabular}{c c c c c c} \hline
**Sample** & **Fruit** & **TPC \(\pm\) SD** & **TFC \(\pm\) SD** & **EA \(\pm\) SD** & **Q \(\pm\) SD** \\  & & **[mg GAE/g dw]** & **[mg CE/g dw]** & **[\(\mathrm{\SIUnitSymbolMicro g}\)/gdw]** & **[\(\mathrm{\SIUnitSymbolMicro g}\)/gdw]** \\  & & **n = 6** & **n = 6** & **n = 3** & **n = 3** \\ \hline S1 & barberry (D) & 17.78 \(\pm\) 0.13 s & 8.85 \(\pm\) 0.22 m & 3.29 \(\pm\) 0.24 j & 24.01 \(\pm\) 0.25 i \\ S2 & blackthorn (D) & 1.28 \(\pm\) 0.04 a & 0.81 \(\pm\) 0.01 a & 2.79 \(\pm\) 0.10 i & 26.29 \(\pm\) 0.68 j \\ S3 & blackthorn (D) & 1.81 \(\pm\) 0.05 b & 1.40 \(\pm\) 0.01 c & 3.50 \(\pm\) 0.16 j & 39.36 \(\pm\) 0.45 l \\ S4 & chokeberry (L) & 8.56 \(\pm\) 0.03 q & 7.82 \(\pm\) 0.10 l & 1.40 \(\pm\) 0.38 g & 27.19 \(\pm\) 1.18 j \\ S5 & chokeberry (D) & 3.06 \(\pm\) 0.06 i & 2.46 \(\pm\) 0.05 e & 0.71 \(\pm\) 0.07 bcd & 105.69 \(\pm\) 2.45 m \\ S6 & chokeberry (L) & 8.89 \(\pm\) 0.21 r & 9.03 \(\pm\) 0.15 n & nd a & 24.51 \(\pm\) 1.41 i \\ S7 & chokeberry (D) & 4.31 \(\pm\) 0.18 l & 2.94 \(\pm\) 0.00 h & nd a & 36.20 \(\pm\) 0.20 k \\ S8 & elderberry (L) & 11.36 \(\pm\) 0.15 t & 10.34 \(\pm\) 0.03 o & 1.38 \(\pm\) 0.26 g & 13.84 \(\pm\) 0.16 f \\ S9 & elderberry (L) & 11.59 \(\pm\) 0.20 u & 10.83 \(\pm\) 0.25 p & 0.92 \(\pm\) 0.02 de & 17.81 \(\pm\) 0.17 g \\ S10 & elderberry (D) & 8.64 \(\pm\) 0.03 q & 7.75 \(\pm\) 0.18 l & 0.92 \(\pm\) 0.09 de & 25.65 \(\pm\) 0.17 j \\ S11 & elderberry (D) & 8.10 \(\pm\) 0.16 p & 5.58 \(\pm\) 0.16 j & 0.69 \(\pm\) 0.04 bc & 13.88 \(\pm\) 0.30 f \\ S12 & hawthorn (D) & 4.82 \(\pm\) 0.09 n & 3.29 \(\pm\) 0.13 h & 1.28 \(\pm\) 0.05 fg & 9.17 \(\pm\) 0.11 e \\ S13 & hawthorn (D) & 3.86 \(\pm\) 0.02 j & 1.78 \(\pm\) 0.10 d & nd a & 6.09 \(\pm\) 0.07 d \\ S14 & hawthorn (D) & 2.93 \(\pm\) 0.09 h & 2.83 \(\pm\) 0.12 g & nd a & 8.90 \(\pm\) 0.02 e \\ S15 & hawthorn (D) & 4.05 \(\pm\) 0.04 k & 2.61 \(\pm\) 0.05 f & nd a & 2.63 \(\pm\) 0.04 ab \\ S16 & lingenberry (L) & 6.85 \(\pm\) 0.03 o & 6.75 \(\pm\) 0.08 k & 0.18 \(\pm\) 0.05 a & 123.42 \(\pm\) 1.70 n \\ S17 & lingenberry (D) & 4.23 \(\pm\) 0.08 l & 3.44 \(\pm\) 0.01 i & 0.50 \(\pm\) 0.05 b & 196.20 \(\pm\) 3.10 o \\ S18 & rowanberry (D) & 1.95 \(\pm\) 0.02 c & 0.92 \(\pm\) 0.02 a & 0.92 \(\pm\) 0.06 cde & 3.71 \(\pm\) 0.51 bc \\ S19 & rowanberry (D) & 2.47 \(\pm\) 0.02 f & 1.39 \(\pm\) 0.01 c & 1.15 \(\pm\) 0.26 f & 22.246 \(\pm\) 1.06 h \\ S20 & rowanberry (D) & 2.13 \(\pm\) 0.02 d & 1.18 \(\pm\) 0.01 b & 0.57 \(\pm\) 0.05 b & 13.52 \(\pm\) 0.64 f \\ S21 & rowanberry (D) & 1.71 \(\pm\) 0.02 b & 0.81 \(\pm\) 0.02 a & 1.13 \(\pm\) 0.11 ef & 1.44 \(\pm\) 0.43 a \\ S22 & sea-buckthorn (L) & 4.66 \(\pm\) 0.15 m & 3.48 \(\pm\) 0.02 i & 4.80 \(\pm\) 0.18 l & 4.06 \(\pm\) 0.30 bc \\ S23 & sea-buckthorn (D) & 2.71 \(\pm\) 0.03 g & 1.40 \(\pm\) 0.03 c & 2.53 \(\pm\) 0.11 h & 8.32 \(\pm\) 0.38 e \\ S24 & sea-buckthorn (D) & 2.25 \(\pm\) 0.07 e & 1.33 \(\pm\) 0.04 c & 4.18 \(\pm\) 0.15 k & 5.36 \(\pm\) 0.21 cd \\ \hline \end{tabular}
\end{table} 
Table 3: Total phenolic content (TPC), total flavonoid content (TFC), ellagic acid (EA), and quercetin (Q) contents in studied materials (mean, \(\pm\)SD). Figure 2: Comparison of contents of free (**A**) ellagic acid (EA) and (**B**) quercetin (Q) in studied fruit samples. Quercetin was present in all fruit samples at quantifiable concentration levels. Lingonberry contained the highest Q amount (from 123.42 to 196.20 \(\mu\)g/g dw, mean 159.81 \(\mu\)g/g dw). Furthermore, the measured Q content in lignoberry was significantly higher than in the other samples (\(p<0.05\)) (Figure 2B). A relatively high Q content was also found in chokeberry. However, the determined Q contents in chokeberry are characterized by a large variation, ranging from 24.51 to 105.69 \(\mu\)g/g dw, mean 48.40 \(\mu\)g/g dw. The above data indicate that Polish medicinal fruits are worth taking into consideration as a source of these bioactive compounds.