## 2 Results and Discussion
### Composition of Volatile Organic Compounds Obtained by Hydrodistillation--Essential Oil and Hydrosol

Table 1: Volatile organic compounds of air-dried _P. ramossissima_ isolated by hydrodistillation and analyzed by gas chromatography-mass spectrometry. Terpenes were the second most important group of identified compounds, with monoterpenes being the most abundant (Figure 1). Hydrophobic terpen dominated in EO, while terpene alcohols dominated in HY. The most abundant terpen in the essential oil were monoterpenes sabinene (10.23%), (_E_)-\(\beta\)-ocimene (7.95%), \(\gamma\)-terpinene (2.80%), and aromatic monoterpene thymol methyl ether (2.32%). None of them was detected in the hydrosol. The mentioned compounds were detected in _P. ramossissima_ in a previously published article [3,4] but in different proportions. In hydrosol, the monoterpene alcohols terpinen-4-ol (11.36%), linalool (3.60%), and (_E_)-4-thujanol (2.09%) dominated among terpen. Monoterpic alcohols were either not detected or their content was below 1.00% in the essential oil. In the group of other aliphatic compounds, the abundance was greater in EO than in HY (Figure 1). The differences in the composition of EO and HY are the result of extraction of different compounds' polarity. \begin{table}
\begin{tabular}{c l c c c} \hline \hline \multirow{2}{*}{**No.**} & \multirow{2}{*}{**Compound**} & \multirow{2}{*}{**RI**} & \multicolumn{2}{c}{**Average Area\% \(\pm\) SD**} \\ \cline{3-5}  & & & **EO** & **HY** \\ \hline
51 & Dec-4-en-1-ol & 1264 & 0.06 \(\pm\) 0.03 & - \\
52 & 2-Phenylbut-2- & 1277 & - & 0.11 \(\pm\) 0.01 \\
53 & (_Z_)-Tridec-3-ene & 1295 & 0.01 \(\pm\) 0.00 & - \\
54 & Indole & 1296 & - & 0.09 \(\pm\) 0.01 \\
55 & Tridecane & 1302 & 0.01 \(\pm\) 0.01 & - \\
56 & Thymol & 1306 & 0.01 \(\pm\) 0.00 & - \\
57 & Undecanal & 1310 & 0.01 \(\pm\) 0.01 & - \\
58 & \(p\)-Vinylguaiacol & 1318 & 0.01 \(\pm\) 0.00 & 0.39 \(\pm\) 0.10 \\  & (4-Ethenyl-2-methoxyphenol) & 1372 & 0.02 \(\pm\) 0.01 & - \\
59 & Cyclosatiere & 1380 & 0.03 \(\pm\) 0.01 & - \\
60 & \(\theta\)-Copane & 1395 & 0.02 \(\pm\) 0.01 & - \\
61 & \(\theta\)-Elemene & 1409 & 0.72 \(\pm\) 0.09 & 0.45 \(\pm\) 0.03 \\
62 & Methyleugenol & 1413 & 0.27 \(\pm\) 0.05 & - \\
63 & Dodecanal & 1416 & 0.06 \(\pm\) 0.01 & - \\
64 & \(\theta\)-Funebrene & 1424 & 2.16 \(\pm\) 0.36 & - \\
65 & Caryophyllene & 1429 & 0.03 \(\pm\) 0.01 & - \\
66 & \(\theta\)-Gurjunene & 1434 & 0.01 \(\pm\) 0.00 & - \\
67 & \(\theta\)-Gurjunene & 1458 & 0.22 \(\pm\) 0.05 & - \\
68 & \(\theta\)-Farrusene & 1462 & 0.04 \(\pm\) 0.01 & - \\
70 & \(\gamma\)-Curcumene & 1471 & 0.01 \(\pm\) 0.00 & - \\
71 & \(\gamma\)-Muurolene & 1478 & 0.03 \(\pm\) 0.00 & - \\
72 & Germacrene D & 1485 & 0.35 \(\pm\) 0.09 & 0.06 \(\pm\) 0.01 \\
73 & Germacrene C & 1499 & 0.05 \(\pm\) 0.01 & - \\
74 & \(\alpha\)-Muurolene & 1503 & 0.06 \(\pm\) 0.02 & - \\
75 & Myristicin & 1538 & 63.92 \(\pm\) 3.80 & 66.67 \(\pm\) 1.45 \\
76 & Elemicin & 1566 & 0.82 \(\pm\) 0.03 & 5.13 \(\pm\) 0.04 \\
77 & Caryophyllene oxide & 1589 & - & 0.06 \(\pm\) 0.01 \\
78 & (_E_)-Isomyristicin & 1621 & 0.04 \(\pm\) 0.00 & - \\
79 & Cubenol & 1648 & 0.05 \(\pm\) 0.01 & - \\
80 & (_E_)-Isoelemicin & 1658 & 0.01 \(\pm\) 0.00 & 0.15 \(\pm\) 0.02 \\
81 & \(\alpha\)-Cadinol & 1661 & 0.07 \(\pm\) 0.01 & - \\
82 & Benzyl benzoate & 1768 & 0.06 \(\pm\) 0.01 & - \\
83 & Neophytaadiene & 1844 & 0.01 \(\pm\) 0.00 & - \\
84 & Phytol & 2120 & 0.13 \(\pm\) 0.09 & - \\ \hline \hline \end{tabular} EO—essential oil of _P. ramossissima_; HY—hydrosol of _P. ramossissima_. SD is the standard deviation of a triplicate sample; RI—retin index.  
\end{table} 
Table 1: _Cont._