## 3 Results
### Evaluation of Volatile Compounds of Aster Species Using HS-SPME-GC-MS Analysis
\begin{table}
\begin{tabular}{c c c c c c c c c c c c} \hline \hline \multicolumn{1}{c}{**No**} & **R1\({}^{\bullet}\)** & **Compounds** & \multicolumn{1}{c}{**Relative Content (\%a)b**\({}^{\bullet}\pm\)**SD**} & \multicolumn{1}{c}{**ID \({}^{\bullet}\)d**} \\ \cline{3-11}  & & & **AYN** & **APN** & **AHD** & **AAR** & **AHT** & **ADG** & **APS** & **AMK** & **AKS** & **ID \({}^{\bullet}\)d** \\ \hline  & & & Fatty acid esters & & & & & & & & & \\
1 & 850 & ethyl isovalerate & 2.28 \(\pm\) 0.33 \({}^{\circ}\) & & & & & & & & \\
2 & 1229 & cis-3-hexyl valerate & 0.32 \(\pm\) 0.14 & & & & & & & & \\  & & Monetepenes & & & & & & & & & \\
3 & 928 & (-)-e-pinene & 16.77 \(\pm\) 2.69 & 1.37 \(\pm\) 0.22 & 5.06 \(\pm\) 1.18 & 2.66 \(\pm\) 0.38 & 17.65 \(\pm\) 3.15 & 1.61 \(\pm\) 0.22 & 0.83 \(\pm\) 0.008 & MS, RI, STD \\
4 & 941 & camphene & 0.47 \(\pm\) 0.08 & 1.86 \(\pm\) 0.61 & 0.96 \(\pm\) 0.17 & 2.01 \(\pm\) 0.21 & 0.92 \(\pm\) 0.08 & 1.02 \(\pm\) 0.09 & MS, RI \\
5 & 998 & \(\beta\)-fluine & 2.27 \(\pm\) 0.32 & 2.75 \(\pm\) 0.30 & 2.62 \(\pm\) 0.41 & 3.86 \(\pm\) 0.20 & 5.66 \(\pm\) 0.31 & 10.66 \(\pm\) 1.15 & 0.66 \(\pm\) 0.07 & MS, RI \\
6 & 991 & \(\beta\)-fluyne & 41.46 \(\pm\) 3.43 & 13.52 \(\pm\) 0.52 & 9.58 \(\pm\) 0.40 & 18.98 \(\pm\) 1.58 & 15.70 \(\pm\) 1.11 & 9.86 \(\pm\) 1.87 & 22.67 \(\pm\) 0.41 & 38.94 \(\pm\) 0.48 & 5.84 \(\pm\) 0.42 & MS, RI, STD \\
7 & 998 & \(\alpha\)-pellindrene & 1.09 \(\pm\) 0.13 & 5.49 \(\pm\) 1.76 & 3.20 \(\pm\) 0.29 & 4.83 \(\pm\) 0.24 & 5.21 \(\pm\) 0.22 & 3.31 \(\pm\) 0.37 & 3.21 \(\pm\) 0.23 & 0.72 \(\pm\) 0.31 & MS, RI \\
8 & 1004 & 3-ccare & & & & & & & & & MS, RI \\
9 & 1010 & 4-ccare & 1.57 \(\pm\) 0.29 & 1.26 \(\pm\) 0.23 & 2.99 \(\pm\) 0.24 & 3.08 \(\pm\) 0.15 & 1.95 \(\pm\) 0.19 & & 1.25 \(\pm\) 0.08 & MS, RI \\
10 & 1019 & p-cymene & 0.69 \(\pm\) 0.03 & & & & & & & & \\
11 & 1022 & D-limeone & 3.66 \(\pm\) 1.06 & 31.66 \(\pm\) 3.52 & 12.86 \(\pm\) 1.28 & 0.148 \(\pm\) 0.38 & 2.67 \(\pm\) 0.39 & 1.20 \(\pm\) 0.37 & 0.49 \(\pm\) 0.25 & MS, RI \\
12 & 1034 & (\(\beta\)-e-gcomene & 0.70 \(\pm\) 0.23 & 0.74 \(\pm\) 0.04 & 0.50 \(\pm\) 0.03 & 0.44 \(\pm\) 0.05 & 0.95 \(\pm\) 0.16 & 3.58 \(\pm\) 0.12 & MS, RI \\
13 & 1047 & trans-g-comine & 19.41 \(\pm\) 4.26 & 0.79 \(\pm\) 0.24 & 23.04 \(\pm\) 0.31 & 12.43 \(\pm\) 0.75 & 14.67 \(\pm\) 2.20 & 16.45 \(\pm\) 3.81 & 7.47 \(\pm\) 0.65 & 2.41 \(\pm\) 0.20 & MS, RI \\
14 & 1052 & \(\gamma\)-triprene & 0.77 \(\pm\) 0.04 & 0.91 \(\pm\) 0.08 & 0.70 \(\pm\) 0.05 & 1.46 \(\pm\) 0.07 & 1.60 \(\pm\) 0.07 & 0.42 \(\pm\) 0.05 & 0.25 \(\pm\) 0.03 & MS, RI \\
15 & 1065 & heteripinedine & & & & & & & MS, RI \\
16 & 1083 & terpindence & & & & & & & & & MS, RI \\
17 & 101 & dureure & & & & & & & & & MS, RI \\
18 & 1114 & p-menth-1,5,8-triene & & & & & & & & MS, RI \\
19 & 1122 & 13-allo-cmeme & 2.50 \(\pm\) 0.47 & & & & & & & MS, RI \\
20 & 1123 & 1,3,8-p-methine & & & & & & & & MS, RI \\
21 & 1134 & \(\alpha\)-meallo-cme & 1.35 \(\pm\) 0.30 & & 1.48 \(\pm\) 0.12 & 1.35 \(\pm\) 0.06 & 0.87 \(\pm\) 0.15 & 1.33 \(\pm\) 0.28 & 0.46 \(\pm\) 0.03 & 0.71 \(\pm\) 0.08 & MS, RI \\
22 & 1127 & thymol methyl ether & & & & & & & & & & \\
23 & 1276 & L-bornyl acetate & & & & & & & & MS, RI \\
24 & 1340 & a-cubene & & & & & & & & & & \\
25 & 1357 & cyclostuveren & & & & & & & & & & \\
26 & 1366 & yangine & 0.98 \(\pm\) 0.36 & & & & & & & & & \\
27 & 1371 & dauene & 0.64 \(\pm\) 0.44 & & & & & & & & & MS, RI \\
28 & 1375 & d-bounce & & & & & & & & & MS, RI \\
29 & 1381 & p-cubene & & & & & & & & & & & MS, RI \\
30 & 1384 & \(\beta\)-demene & & & & & & & & & & & \\
31 & 1400 & \(\alpha\)-guiruene & 0.59 \(\pm\) 0.41 & & & & & & & & & \\
32 & 1410 & carryophyllene & 2.59 \(\pm\) 1.68 & 2.39 \(\pm\) 0.50 & 6.25 \(\pm\) 0.33 & 1.45 \(\pm\) 0.29 & 4.44 \(\pm\) 1.04 & 0.34 \(\pm\) 0.06 & 2.25 \(\pm\) 0.11 & 24.54 \(\pm\) 5.05 & MS, RI, STD \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Volatile compounds identified, and their contents in nine _Aster_ species’ flowers.