## 3 Results and Discussion
### The Composition and Changes of VOCs in the Ripening Process of _R. roxburghii_ Fruit
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline \multirow{2}{*}{**No.**} & \multirow{2}{*}{**Compounds**} & \multirow{2}{*}{**RT**} & \multirow{2}{*}{**RI**} & \multirow{2}{*}{**LRI**} & \multicolumn{6}{c}{**Relative Content (mg/kg)**} \\ \cline{5-10}  & & & & & **I** & **II** & **III** & **IV** & **V** \\ \hline
20 & 1-Pentanol & 9.648 & 763 & ND & ND & ND & ND & 0.36 & 0.21 & 3.20 \\
21 & (3E)-3-Hexen-1-ol & 12.571 & 852 & 864.1 & ND & ND & 50.71 & ND & 102.41 \\
22 & (Z)-2-Hexen-1-ol & 12.857 & 865 & 867.6 & ND & ND & ND & ND & 0.84 \\
23 & 1-Hexanol & 12.914 & 867 & 869.4 & 26.36 & 23.38 & 21.98 & 7.97 & 14.41 \\
24 & 1-Heptonol & 15.665 & 968 & 971.4 & ND & ND & ND & ND & 2.11 \\
25 & 2-Ethylhexanol & 17.179 & 1031 & 1040.0 & 1.75 & 3.14 & ND & 1.34 & ND \\
26 & 1-Cotanol & 18.036 & 1064 & 1079.7 & 3.33 & 5.61 & 8.91 & 15.68 & ND \\
27 & Phenethyl alcohol & 19.064 & 1110 & 1133.3 & 1.03 & ND & ND & ND & ND \\
28 & (Z)-3-Nonen-1-ol & 19.502 & 1126 & 1157.2 & ND & ND & ND & ND & 0.75 \\
29 & 1-Nonanol & 19.969 & 1171 & 1182.2 & 1.31 & 2.86 & ND & ND & ND \\
30 & \(\alpha\)-Terpineol & 20.349 & 1192 & 1211.9 & 0.81 & 0.38 & ND & 2.99 & 0.72 \\
31 & Neraniol & 20.921 & 1232 & 1233.3 & ND & ND & ND & ND & 1.30 \\
32 & (R)- (+)-\(\beta\)-Citronellol & 21.054 & ND & 1240.2 & 0.17 & ND & ND & ND & ND \\
33 & Iso-geraniol & 21.187 & 1273 & 1247.2 & ND & ND & ND & ND & 30.38 \\
34 & Geraniol & 21.587 & 1260 & 1265.6 & ND & 0.46 & 0.40 & ND & ND \\
35 & 1-Decanol & 21.835 & 1279 & 1281.0 & ND & ND & 0.30 & ND & ND \\
36 & 1-Hexadecanol & 22.406 & 1876 & 1309.5 & ND & ND & ND & 1.36 & ND \\  & Alcohols (17) & & & & & 34.76 & 35.82 & 82.65 & 29.54 & 156.11 \\ \hline
37 & Isamyl acetate & 13.181 & 876 & 878.1 & ND & ND & 0.46 & 0.72 & 5.03 \\
38 & 2-Methylbutyl acetate & 13.257 & 879 & 880.5 & ND & ND & ND & 0.66 & 3.70 \\
39 & Methyl hexanoate & 14.523 & 923.2 & 926.3 & ND & ND & ND & ND & 8.77 \\
40 & Methyl hydrosorbate & 14.732 & ND & 934.5 & ND & ND & ND & ND & 0.38 \\
41 & Ethyl hexanoate & 16.37 & 1000 & 999.2 & ND & ND & ND & 32.04 & 15.35 \\
42 & (E)-3-Hexenyl acetate & 16.551 & 1004 & 1007.8 & ND & ND & ND & ND & 56.61 \\
43 & (Z)-3-Hexenyl acetate & 16.694 & 1007 & 1016.1 & 46.07 & 218.88 & 142.66 & 29.54 & ND \\
44 & Hexyl acetate & 16.818 & 1011 & 1020.7 & 3.45 & 28.04 & 13.71 & 2.82 & 3.21 \\
45 & Hex-2-enyl acetate & 16.875 & ND & 1023.5 & ND & ND & 2.20 & ND & ND \\
46 & (E)-2-Hexenyl acetate & 16.912 & 1017 & 1025.3 & ND & 7.47 & ND & ND & ND \\
47 & 1-Methylhexyl acetate & 17.284 & 1043 & 1043.3 & ND & ND & ND & 1.35 \\
48 & (Z)-3-Hexenyl propanoate & 18.626 & 1100 & 1109.8 & 0.88 & 2.07 & ND & ND & ND \\
49 & Caprylic acid methyl ester & 18.912 & 1126 & 1124.9 & ND & ND & 0.46 & 0.60 & 35.41 \\
50 & (E)-Hex-3-enyl butyrate & 20.207 & ND & 1195.8 & 0.75 & ND & 6.91 & ND & ND \\
51 & (Z)-3-Hexenyl butanoate & 20.207 & 1187 & 1195.8 & ND & ND & 15.54 & 1.26 & ND \\
52 & Hexyl isobutyrate & 20.292 & 1150 & 1200.4 & ND & ND & 0.40 & ND & ND \\
53 & Hexyl butyrate & 20.321 & 1191 & 1201.9 & ND & 0.51 & 1.23 & ND & ND \\
54 & Ethyl acrylate & 20.378 & 1195 & 1204.9 & ND & 0.39 & 0.41 & 31.58 & 4.32 \\
55 & (Linaly) butanoate & 21.064 & 1422 & 1240.8 & ND & ND & ND & 0.73 & ND \\
56 & (Z)-3-Hexenyl 2-methylbutanoate & 21.083 & 1233.5 & 1241.7 & 0.27 & 1.37 & 1.30 & ND & ND \\
57 & Fema 3498 & 22.063 & 1240 & 1292.9 & ND & ND & 0.92 & ND & ND \\
58 & Undecyl trichloroacetate & 22.244 & ND & 1302.1 & ND & ND & ND & ND & 3.81 \\
59 & (Z,Z)-3-Hexenyl 2-methyl-2-butenoate & 22.996 & 1282.2 & 1336.5 & ND & 2.86 & ND & ND & ND \\
60 & (E)-hexyl 2-Methylbut-2-enoate & 23.091 & 1331 & 1340.8 & ND & 0.39 & ND & ND & ND \\
61 & (3Z)-3-Hexenyl hexanoate & 23.996 & 1380 & 1389.5 & ND & 1.01 & 1.51 & ND & 0.45 \\
62 & (Z)-3-Hexenoic acid (Z)-3-hexenyl ester & 24.329 & ND & 1397.4 & ND & 2.79 & 5.84 & ND & ND \\
63 & (E)-2-Hexenoic acid (Z)-3-hexenyl ester & 25.5 & ND & 1440.8 & ND & 0.35 & 0.80 & ND & ND \\
64 & Diethyl phthalate & 29.622 & 1602.3 & 1606.5 & 1.08 & ND & ND & 2.36 \\
65 & Bis (2-ethylhexyl) adipate & 31.498 & ND & 1698.5 & ND & 17.86 & ND & ND & ND \\
66 & Dioctyl adipate & 31.517 & ND & 1699.5 & 0.18 & ND & ND & ND \\ Esters (30) & & & & & 52.69 & 283.97 & 194.35 & 99.94 & 140.75 \\ \hline
67 & Hexanoic acid & 15.999 & 981 & 984.6 & ND & ND & ND & 7.93 \\
68 & Octanoic acid & 19.94 & 1178 & 1178.1 & ND & 0.96 & 12.23 & 9.85 & 268.93 \\
69 & Nonanoic acid & 21.454 & 1280 & 1269.6 & ND & ND & 1.00 & 0.82 & 1.33 \\ Acids (3) & & & & & ND & 0.96 & 13.22 & 10.67 & 278.19 \\ \hline \hline \end{tabular}
\end{table}