## 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} \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{5-9}  & & & & & **I** & **II** & **III** & **IV** & **V** \\ \hline
115 & (R)-Valencene & 27.509 & 1494 & 1521.2 & ND & ND & ND & ND & 17.73 \\  & Naphthalene, 1,2,3,7,8,8a-hexahpro- & & & & & & & & \\
116 & 5,8a-dimethyl-3- (1-methylethenyl)-, & 27.557 & ND & 1523.1 & ND & ND & 3.24 & 9.83 & 0.20 \\  & (3R,8 aR)- & & & & & & & & \\
117 & \(\gamma\)-Cadinene & 27.604 & 1502 & 1525.0 & ND & ND & ND & 4.24 & ND \\
118 & Eremophilene & 27.661 & 1503 & 1527.2 & ND & ND & ND & 2.14 & ND \\  & 1H-Cycloprop[e]azulene, decahydro- & & & & & & & & \\
119 & 1,1,7-trimethyl-4-methylene-, & 27.757 & ND & 1531.0 & ND & ND & ND & 1.26 & 1.37 \\  & (1 aR,4 aR,7R,7 aR,7b5)-rel- & & & & & & & & \\
120 & (+)-Calarene & 27.994 & 1432 & 1540.5 & ND & ND & ND & ND & 1.31 \\
121 & \(\Delta\)-Cadinene & 28.271 & 1525 & 1551.5 & ND & ND & 0.25 & 4.82 & ND \\  & Naphthalene, 1,2,3,4a,5,6,8a- & & & & & & & & \\
122 & octahydro-4a,8-dimethyl-2- & & 28.366 & 1518 & 1555.3 & ND & ND & ND & 7.51 & ND \\  & (1-methylethenyl)-, (2S,4 aR,8 aR)- & & & & & & & & \\
123 & Cadinadiene,cadina-1,4-diene & 28.566 & 1542 & 1563.2 & ND & ND & ND & 0.22 & ND \\
124 & Elemicin & 28.709 & 1554 & 1568.9 & ND & ND & 0.18 & 2.64 & 11.61 \\
125 & \(\alpha\)-Calacorene & 28.87 & 1540 & 1570.0 & ND & ND & ND & 0.15 & 1.34 \\
126 & Caryophyllene oxide & 29.937 & 1617 & 1621.9 & ND & ND & 0.55 & 1.01 & ND \\
127 & \(\alpha\)-Bulnesene & 31.403 & 1526 & 1693.9 & ND & ND & ND & 0.71 & ND \\  & Alkenes (44) & & & & & 0.56 & 5.00 & 56.54 & 143.01 & 389.34 \\ \hline
128 & Cyclohexane & 7.183 & ND & ND & 0.26 & 0.12 & ND & ND & ND \\
129 & Methylcyclohexane & 8.411 & 736 & ND & ND & ND & ND & ND & 0.70 \\
130 & (Z)-1,3-Dimethylcyclopentane & 15.818 & ND & 977.4 & ND & ND & ND & 0.46 & ND \\  & Bicyclo2.2.1 heptane, & & & & & & & & \\
131 & 7,7-dimethyl-2-methylene- & & 18.312 & 951 & 1093.0 & ND & ND & ND & 0.16 & ND \\
132 & 2,4-Pentenedi Diacetate & 18.922 & ND & 1117.7 & ND & ND & ND & 0.68 & 8.62 \\
133 & 1-Methyliney-4 & & 22.12 & 1007 & 1295.9 & ND & ND & ND & ND & 2.38 \\  & Cyclopropane, 1,1-dimethyl-2- & & & & & & & & \\
134 & (3-methyl-1,3-butudien-1-yl)- & & 22.273 & ND & 1303.4 & ND & ND & ND & 1.80 & ND \\
135 & 1-Methylenesipro[4,4]nonane & 24.377 & ND & 1399.5 & ND & ND & ND & 2.79 & ND \\
136 & C15 H24, & 26.947 & 1477 & 1498.8 & ND & ND & ND & ND & 1.96 \\  & Alkenes (9) & & & & & & 0.26 & 0.12 & ND & 5.89 & 13.66 \\ \hline
137 & Methyl eugenol & 24.805 & 1404 & 1416.1 & ND & ND & ND & ND & 11.47 & ND \\
138 & 2,4-Di-tert-butylphenol & 27.69 & 1519 & 1528.4 & 0.13 & ND & ND & ND & ND \\
139 & 2,6-Di-tert-butylphenol & 27.69 & ND & 1528.4 & ND & 0.09 & ND & ND & ND \\
140 & Butylated hydroxytoluene & 27.899 & 1514 & 1536.7 & ND & 0.66 & ND & ND & ND \\  & Phenols (4) & & & & & 0.13 & 0.75 & ND & 11.47 & ND \\ \hline
141 & 2-Methylfuran & 9.239 & 600 & ND & ND & ND & ND & ND & 0.19 \\
142 & \(\alpha\)-Agarofuran & 28.994 & 1543 & 1580.3 & ND & 0.52 & 1.10 & 2.80 & 6.10 \\  & Heterocycles (2) & & & & & ND & 0.52 & 1.10 & 2.80 & 6.29 \\
143 & 4-Allylanisole & 20.607 & 1199 & 1208.9 & ND & ND & ND & 11.00 & 16.35 \\
144 & 2H-1-Benzopyran, 3,4,4a,5,6,8a- & & & & & & & & \\  & hexahydro-2,5,5,8a-tetramethyl- & & & & & & & & \\
145 & Edulan I & 22.863 & 1315 & 1330.4 & ND & ND & 1.29 & ND & 8.59 \\  & Others (5) & & & & & ND & 1.29 & 11.61 & 24.94 \\ \hline  & & & & & & & & & \\ \end{tabular} Note: RT represents Retention Time; RI represents the Retention Index, and the RI was calculated by C?-C#0 n-alkanes on the HP-5 MS Capillary GC Column (Length 60 m, inner diameter 0.25 mm, and film thickness 0.25 \(\mu\)m; Agilent, USA); LRI represents the Literature Retention Index, and the LRI was collected from NIST Chemistry WebBook database: webbook.nist.gov; I, II, III, IV, and V represent the different stages of fruit maturity; ND indicates not detected.  
\end{table}