## 3 Results and Discussion
### Essential Oils Characterization by Gas Chromatography-Mass Spectrometry (GC-MS)
\begin{table}
\begin{tabular}{l c c c c c} \hline \hline \multirow{2}{*}{**Identified Compound**} & \multirow{2}{*}{**R.T. (min)**} & \multirow{2}{*}{**RI\({}_{\text{exp}}\)**} & \multirow{2}{*}{**RI\({}_{\text{lit}}\)**} & \multicolumn{2}{c}{**Percentage in the**} \\  & & & & \multicolumn{2}{c}{**Samples (\%)**} \\ \cline{5-6}  & & & & \(A\). & \(L\). \\  & & & & _foneticulum_ & _anguestifolia_ \\ \hline \(1\)-Hexanol & 5.80 & 870 & 870 & - & 0.1 \\ \hline \(\alpha\)-Pinene & 8.01 & 925 & 933 & - & 0.1 \\ \hline Camphene & 8.56 & 938 & 941 & - & 0.3 \\ \hline Sabinene & 9.57 & 963 & 961 & 0.1 & - \\ \hline \(\beta\)-Pinene & 9.68 & 966 & 964 & - & 0.1 \\ \hline \(1\)-Octen-\(3\)-ol & 9.81 & 970 & 976 & 0.5 & 0.4 \\ \hline \(3\)-Octanone & 10.15 & 977 & 982 & 0.1 & 0.9 \\ \hline \(\beta\)-Myrcene & 10.33 & 982 & 989 & 0.3 & 0.6 \\ \hline \(3\)-Octanol & 10.52 & 986 & 993 & - & 0.1 \\ \hline Butyl butyrate & 10.56 & 987 & 995 & - & 0.2 \\ \hline Hexyl acetate & 11.33 & 1006 & 1008 & - & 0.7 \\ \hline \(o\)-Cymene & 11.73 & 1016 & 1023 & - & 0.5 \\ \hline \(\mathbf{Limonene}\) & **11.90** & **1022** & **1028** & **10.5** & 0.5 \\ \hline \(1\),\(\beta\)-Cineol & 12.00 & 1023 & 1031 & - & 2.2 \\ \hline _cis_-\(\beta\)-Ocimene & 12.40 & 1032 & 1038 & - & 0.4 \\ \hline _trans_-\(\beta\)-Ocimene & 12.85 & 1043 & 1048 & - & 0.2 \\ \hline _cis_-Linalool oxide & 13.90 & 1069 & 1075 & - & 5.6 \\ \hline _trans_-Linalool oxide & 14.63 & 1087 & 1083 & - & 4.1 \\ \hline \(\mathbf{Linalool}\) & **15.20** & **1101** & **1101** & 0.1 & **38.8** \\ \hline \(\mathrm{Hotrienol}\) & 15.40 & 1106 & 1107 & - & 0.7 \\ \hline \(1\)-Octen-\(3\)-yl-acetate & 15.82 & 1117 & 1116 & 0.2 & 2.3 \\ \hline \(\mathrm{\it trans}\)-\(p\)-Mentha-\(2\)-\(8\)-dien-1-ol & 16.07 & 1122 & 1123 & 0.1 & - \\ \hline \(3\)-Octanol acetate & 16.14 & 1127 & 1124 & - & 0.1 \\ \hline _cis_-\(p\)-Mentha-\(2\),\(8\)-dien-1-ol & 16.74 & 1139 & 1138 & 0.1 & - \\ \hline Camphor & 17.13 & 1149 & 1148 & - & 2.7 \\ \hline Hexyl isobutyrate & 17.52 & 1158 & 1151 & - & 0.1 \\ \hline Menthone & 17.62 & 1161 & 1160 & 1.0 & - \\ \hline Nerol oxide & 17.72 & 1163 & 1163 & - & 0.2 \\ \hline \(\mathbf{Isomenthone}\) & **18.09** & **1172** & **1170** & **7.1** & - \\ \hline Borneol & 18.13 & 1173 & 1168 & - & 3.9 \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Identification, retention time (min) and relative amounts (%) of compounds in the essential oils of _Agastache foneticulum_ and _Lazandula angustigolia_. Results are expressed as average percentage (%) of peak area \(\pm\) standard deviation (n = 3). Compounds are listed in order of elution from the HP-5 MS column. Major compounds are presented in bold. Abbreviations: n.d.: not determined, which means compounds that were not identified in the studied samples; R.T.: retention time of the eluted compounds expressed in minutes; RI\({}_{\text{exp}}\): experimental retention index calculated relative to n-alkanes series standards (C7–C30) on the HP-5 MS column; RI\({}_{\text{lit}}\): literature retention index on the similar phase column. RI\({}_{\text{exp}}\) and RI\({}_{\text{lit}}\) values associated with “-” were unable to be determined. Percentage values for compounds associated with “-” indicate that said compound was not present in the respective EO.