## 3 Results and Discussion
### Analysis of Phenolic Compounds  
The identified phenolic compounds, along with retention times and concentrations, are summarized in Table 6. A total of 30 to 34 distinct compounds were identified in the samples. Notably, the isomer of sagerinic acid, a phenolic acid, was distinguished from other components at a retention time of 14.8 min, showing the highest concentrations of 3093.9 and 3890.2 ppm in EBT and EBF, respectively. Following this, dimeric caffeoylquinic acid, another phenolic acid, demonstrated significant concentrations of 2169.2 and 1929.9 ppm, while acetyl-diferuloyl sucrose, classified as a phenolic glycoside, showed concentrations of 858.8 and 738.4 ppm. Additionally, the compound aromadendrin-6-C-\(\beta\)-D-glucopyranosyl \begin{table}
\begin{tabular}{l c c c c c c c} \hline \hline \multicolumn{1}{c}{**Compound (\%)**} & \multicolumn{1}{c}{**R\({}_{t}\) (min)**} & \multicolumn{1}{c}{**KI (Exp.)**} & \multicolumn{1}{c}{**KI (Lit)**} & \multicolumn{1}{c}{**EBT**} & \multicolumn{1}{c}{**EBF**} & \multicolumn{1}{c}{**EPT**} & \multicolumn{1}{c}{**EPF**} \\ \hline trans-Pinocarryl acetate & 19.66 & 1295 & 1297 & 0.69 & 1.41 & n.d. & n.d. \\ Copaene & 21.96 & 1378 & 1377 & n.d. & 0.22 & 0.38 & n.d. \\ \(\beta\)-Cubebene & 21.96 & 1378 & 1372 & n.d. & 0.24 & 0.24 & n.d. \\ \(\beta\)-Elemene & 22.30 & 1391 & 1392 & 0.615 & 1.88 & 7.51 & 7.24 \\ Caryophyllene & 23.13 & 1423 & 1418 & 0.42 & 1.58 & 0.21 & n.d. \\ \(\beta\)-gurjunene & 23.44 & 1435 & 1432 & n.d. & 0.23 & n.d. & n.d. \\ (E)-\(\beta\)-Famesene & 23.87 & 1452 & 1458 & n.d. & 0.26 & 7 & 1.42 \\ Humuleene & 24.05 & 1459 & 1455 & n.d. & 0.43 & 0.19 & n.d. \\ \(\alpha\)-Curcumene & 24.64 & 1481 & 1486 & n.d. & 0.53 & n.d. & n.d. \\ \(\beta\)-Seliene & 24.92 & 1492 & 1489 & 0.5 & 1.48 & 13.07 & 11.34 \\ \(\beta\)-Bisabolene & 25.31 & 1508 & 1500 & 0.39 & 1.18 & n.d. & n.d. \\ Sesquicineole & 25.45 & 1514 & 1516 & 24.33 & 25.03 & 1.29 & 1.00 \\ \(\beta\)-Cadinene & 25.59 & 1520 & 1520 & 0.54 & 0.29 & n.d. & n.d. \\ (-)-\(\beta\)-Panainsen & 25.68 & 1523 & 1521 & n.d. & n.d. & 0.33 & 0.29 \\ \(\beta\)-Sesquiphellanderene & 25.71 & 1531 & 1521 & 0.39 & 0.69 & n.d. & n.d. \\ Sesquicineole & 25.85 & 1525 & 1524 & 0.45 & 0.26 & n.d. & n.d. \\ Elemol & 26.311 & 1529 & 1520 & n.d. & n.d. & 0.7 & 1.25 \\ Spatulenol & 27.055 & 1570 & 1572 & 20.69 & 14.37 & 0.57 & 0.97 \\ Carotol & 27.68 & 1580 & 1578 & 0.38 & 0.455 & n.d. & n.d. \\ 2-Furammethanol, tetrahydro-\(\alpha\), \(\alpha\),5-trimethyl-5-(4-methyl-3-cyclohexen-1-yl) & 28.875 & 1606 & 1598 & 1.33 & 0.73 & n.d. & n.d. \\ \(\alpha\)-Bisabolol & 29.533 & 1658 & 1656 & 0.485 & 0.54 & n.d. & n.d. \\ \hline \hline \end{tabular}  
* Values are mean \(\pm\) standard deviation (n = 3). EBF: _E. billardieri_ flowers; EBT: _E. billardieri_ thorns; EPF: _E. planum_ flowers; EPT: _E. planum_ thorns; R\({}_{t}\) = Retention time; KI = Kovats index; Exp = Experimental; Lit = Literature; n.d.: not detected.  
\end{table} 
Table 5: _Cont._7-O-[\(\beta\)-D-apiofuranosyl-(1\(\rightarrow\)2)]-O-\(\beta\)-D-glucopyranoside was detected at concentrations of 682.1, 622.2 ppm, alongside 4-feruloyl-5-caffeoylquinic acid with concentrations of 406.9 and 365.2 ppm, both of which were categorized under flavonoids in EBT and EBF, respectively. The data also reveal variation in compound concentrations between EBF and EBT, with other identified compounds present in minor amounts, ranging from 116.0 to 497.1 ppm.