## 2 Results  
### Analysis of Essential Oil Compositions  
The average content of leaf and stem volatiles were 1.1% and 0.6% \(v/w\), respectively, on the basis of dry mass. Total ion chromatogram from leaf and stem oils in _F. japonicum_ was seen in Figure 1. Table 1 shows that 73 constituents were successfully identified, with 47 compounds found in the leaf and 40 in the stem, accounting for 97.2% and 94.2% of the total volatiles, respectively. The dominant constituents of leaf oil were (\(E\))-3-hexen-1-ol (13.7%), (\(Z\))-3-hexen-1-ol (14.0%), tetratetracontane (4.7%), heneicosane (4.4%), and 1,2,3,4,5,6,7,8-octahydro-9,10-dimethyl-anthracene (4.2%), while those of the stem were 2-(1-cyclopent-1-enyl-1-methylethyl)cyclopentanone (11.7%), 1,2,3,4,5,6,7,8-octahydro-9,10-dimethyl-anthracene (8.4%), 5-heptylresorcinol (6.5%), \(\alpha\)-sitosterol (5.2%), 1,3-dimethyl-benzene (4.4%), and 1,1'-bicyclohexyl (4.0%). This depicted a vast difference in leaf and stem compositions. Meanwhile, only 13 common compounds were presented in both the leaf and stem oil, accounting for 21.7% and 55.6% of the total volatiles, respectively. This demonstrated a significant difference between the composition of both oils. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multirow{2}{*}{**No.**} & \multirow{2}{*}{**Compounds**} & \multirow{2}{*}{**LRI**} & \multirow{2}{*}{**KRI**} & \multicolumn{2}{c}{**RA/\%**} \\ \cline{3-6}  & & & & **Leaf** & **Stem** \\ \hline
1 & & & 812 & 810 & - & 1.2 \\
2 & _cis_-1,2-Dimethyl-cyclohexane (\({}^{\text{H}}\)) & 822 & 820 & - & 0.6 \\
3 & Ethyl-cyclohexane (\({}^{\text{H}}\)) & 827 & 829 & - & 2.3 \\
4 & (_E_)-3-Heven-1-ol (\({}^{\text{Ac}}\)) & 849 & 847 & 13.7 & - \\
5 & (_2_)-3-Heven-1-ol (\({}^{\text{Ac}}\)) & 851 & 847 & 14.0 & - \\
6 & 1,3-Dimethyl-benzene (\({}^{\text{H}}\)) & 852 & 853 & - & 4.4 \\
7 & Benzaldehyde (\({}^{\text{Ac}}\)) & 964 & 964 & 0.2 & - \\
8 & Hydroprograde, hexyl (\({}^{\text{Ac}}\)) & 977 & 978 & 3.5 & - \\
9 & 1,2,4-Trimethyl-benzene (\({}^{\text{B}}\)) & 986 & 989 & - & 0.1 \\
10 & Trimethylenemobenzene (\({}^{\text{H}}\)) & 990 & 990 & - & 0.1 \\
11 & Decane (\({}^{\text{H}}\)) & 1002 & 1000 & - & 0.1 \\
12 & 1,2,3-Trimethyl-benzene (\({}^{\text{B}}\)) & 1005 & 1005 & - & 0.4 \\
13 & 1,2,4,5-Tetramethyl-benzene (\({}^{\text{B}}\)) & 1098 & 1098 & - & 2.9 \\
14 & 1,2,4,5-Tetramethyl-benzene (\({}^{\text{B}}\)) & 1108 & 1109 & 0.5 & 0.9 \\
15 & 2-Ethyl-1-hexanol (\({}^{\text{Ac}}\)) & 1010 & 1010 & 1.7 & 3.4 \\
16 & 1,4-Diethyl-benzene (\({}^{\text{B}}\)) & 1045 & 1046 & 1.2 & 3.6 \\
17 & Benzenesulfaldehyde (\({}^{\text{Ad}}\)) & 1047 & 1048 & 1.9 & - \\
18 & 1-Ethyl-2,3-dimethyl-benzene (\({}^{\text{B}}\)) & 1093 & 1096 & - & 0.9 \\
19 & 4-Ethenyl-1,2-dimethyl-benzene (\({}^{\text{B}}\)) & 1098 & 1100 & - & 0.1 \\
20 & Pentyl-cyclohexane (\({}^{\text{H}}\)) & 1123 & 1121 & - & 0.1 \\
21 & 4-Terpened (\({}^{\text{T}}\)) & 1160 & 1160 & - & 1.7 \\
22 & 4-Terpened (\({}^{\text{T}}\)) & 1170 & 1172 & - & 1.7 \\
23 & 2,3-Dhydroxy-benzofuran (\({}^{\text{B}}\)) & 1185 & 1188 & 0.5 & - \\
24 & Naphthalene (\({}^{\text{B}}\)) & 1191 & 1190 & 1.1 & - \\
25 & Dodecane (\({}^{\text{H}}\)) & 1201 & 1200 & - & 0.6 \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Volatile compounds of leaf and stem from _Fartigium japonicum_. Figure 1: Total ion chromatogram from leaf (**a**) and stem (**b**) oils in _F. japonicum_. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multirow{2}{*}{**No.