## 3 Results and Discussion
### Key Volatile Compounds Identified in OOT and TOT
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**No.**} & \multirow{2}{*}{**Compounds**} & \multicolumn{2}{c}{**Relative Contents \({}^{\mathbf{a}}\)**} & \multirow{2}{*}{**Aroma Description \({}^{\mathbf{b}}\)**} & \multicolumn{2}{c}{**RI (Cal) \({}^{\mathbf{c}}\)/**} & \multirow{2}{*}{**I Method \({}^{\mathbf{e}}\)**} \\ \cline{3-4} \cline{6-7}  & & **TOT** & **OOT** & & & **RI (Ref) \({}^{\mathbf{d}}\)** & **I Method \({}^{\mathbf{e}}\)** \\ \hline
6 & 1,3,8-p- & 0.77 \(\pm\) 0.03 & 0.66 \(\pm\) 0.09 & \multicolumn{1}{c}{} & & \\
7 & \(\alpha\)-Copaene & 0.68 \(\pm\) 0.05 & 0.33 \(\pm\) 0.03 & \multicolumn{1}{c}{} & & \\
8 & \(\alpha\)-Cedrene & 0.19 \(\pm\) 0.02 & - & Wood, spice \({}^{\mathbf{d}}\) & 1418/1408 & MS, RI \\
9 & \(\beta\)-Caryophyllene & 0.79 \(\pm\) 0.09 & 0.44 \(\pm\) 0.03 & \multicolumn{1}{c}{} & & \\
10 & (\(E\))-\(\beta\)-Farmesene & 0.28 \(\pm\) 0.08 & 0.56 \(\pm\) 0.07 & Wood, citrus, sweet \({}^{\mathbf{2}}\) & 1458/1443 & MS, RI \\
11 & Allocorandandendrene & 0.15 \(\pm\) 0.06 & 0.16 \(\pm\) 0.01 & Wood \({}^{\mathbf{2}}\) & 1466/1457 & MS, RI \\
12 & \(\gamma\)-Muroulene & 0.27 \(\pm\) 0.06 & 0.19 \(\pm\) 0.01 & Herb, wood, spice \({}^{\mathbf{2}}\) & 1481/1474 & MS, RI \\
13 & \(\alpha\)-Curcumene & 0.30 \(\pm\) 0.06 & - & Herbal \({}^{\mathbf{2}}\) & 1486/1481 & MS, RI \\
14 & \(\alpha\)-Muurolene & 0.37 \(\pm\) 0.09 & 0.20 \(\pm\) 0.01 & Wood \({}^{\mathbf{1}}\) & 1504/1497 & MS, RI \\
15 & \(\alpha\)-Farmesene & 0.86 \(\pm\) 0.25 & 3.36 \(\pm\) 0.49 & Wood, green, floral, & 1511/1507 & MS, RI \\
16 & \(\gamma\)-Cadinene & 0.20 \(\pm\) 0.05 & 0.12 \(\pm\) 0.00 & Wood \({}^{\mathbf{2}}\) & 1519/1511 & MS, RI \\
17 & \(\alpha\)-Calacorene & 0.25 \(\pm\) 0.06 & 0.14 \(\pm\) 0.00 & Wood \({}^{\mathbf{1}}\) & 1548/1542 & MS, RI \\  & **Total alkene** & **9.46 \(\pm\) 0.39** & **13.66 \(\pm\) 1.76** & & & \\ \hline  & & \multicolumn{4}{c}{**Aldehydes**} & \multicolumn{1}{c}{} & & \\
**1** & Furfural & 0.43 \(\pm\) 0.00 & 0.27 \(\pm\) 0.06 & Sweet, bready, & & \\  & & & & & & \\
**2** & Benzaldehyde & 1.00 \(\pm\) 0.06 & 0.77 \(\pm\) 0.13 & \multicolumn{1}{c}{} & & \\  & Benzene & 0.52 \(\pm\) 0.02 & 0.30 \(\pm\) 0.05 & \multicolumn{1}{c}{} & & \\  & acetaldehyde & & & & & \\
**4** & Decanal & 0.43 \(\pm\) 0.11 & 0.29 \(\pm\) 0.02 & \multicolumn{1}{c}{} & & \\  & **Total aldehydes** & **2.38 \(\pm\) 0.19** & **1.63 \(\pm\) 0.25** & & & \\ \hline  & & \multicolumn{4}{c}{**Ketones**} & \multicolumn{1}{c}{} & & \\
**1** & (\(Z\))-Jasmone & 1.00 \(\pm\) 0.18 & 0.48 \(\pm\) 0.06 & Sweet, flower \({}^{\mathbf{4}}\) & 1402/1396 & MS, RI \\
**2** & \(\alpha\)-Ionone & 0.08 \(\pm\) 0.02 & 0.20 \(\pm\) 0.01 & \multicolumn{1}{c}{} & & \\
**3** & Geranylacetone & 0.59 \(\pm\) 0.14 & 0.41 \(\pm\) 0.04 & Magnolia, green \({}^{\mathbf{2}}\) & 1454/1452 & MS, RI \\
**4** & (\(E\))-\(\beta\)-Ionone & 0.55 \(\pm\) 0.14 & 1.02 \(\pm\) 0.13 & Seaweed, violet, flower, & & \\  & **Total ketones** & **2.22 \(\pm\) 0.48** & **2.11 \(\pm\) 0.23** & & & \\ \hline  & & \multicolumn{4}{c}{**Esters**} & \multicolumn{1}{c}{} & & \\
**1** & Methyl salicylate & 0.34 \(\pm\) 0.04 & 0.27 \(\pm\) 0.03 & Fresh, floral, fruity \({}^{\mathbf{1}}\) & 1196/1187 & MS, RI \\
**2** & Hexanoic acid, & 0.33 \(\pm\) 0.05 & 0.62 \(\pm\) 0.08 & Fruity, brandy, ether \({}^{\mathbf{4}}\) & 1387/1385 & MS, RI \\
**3** & Jasmine Lactone & 1.41 \(\pm\) 0.28 & 1.24 \(\pm\) 0.16 & Fruit \({}^{\mathbf{3}}\) & 1486/- & MS \\
**4** & dihydroactinidiolide & 0.57 \(\pm\) 0.15 & 0.88 \(\pm\) 0.07 & Wood, fruit \({}^{\mathbf{4}}\) & 1536/1525 & MS, RI \\  & **Total esters** & **2.65 \(\pm\) 0.52** & **3.01 \(\pm\) 0.33** & & & \\ \hline  & & \multicolumn{4}{c}{**Other components**} & \multicolumn{1}{c}{} & & \\
**1** & \(p\)-Xylene & 0.36 \(\pm\) 0.02 & 0.52 \(\pm\) 0.03 & Plastic, green, pungent \({}^{\mathbf{1}}\) & -/870 & MS, RI \\
**2** & o-Cymene & 0.36 \(\pm\) 0.06 & - & Aromatic \({}^{\mathbf{1}}\) & 1025/1021 & MS, RI \\
**3** & Ethanone,1-(1H- & 0.74 \(\pm\) 0.02 & 1.17 \(\pm\) 0.20 & Toast \({}^{\mathbf{4}}\) & 1064/1063 & MS, RI \\
**4** & Indole & 1.26 \(\pm\) 0.17 & 2.18 \(\pm\) 0.41 & Floral, animal-like \({}^{\mathbf{1}}\) & 1296/1293 & MS, RI \\
**5** & (\(E\))-Isoeugenol & & 0.28 \(\pm\) 0.05 & Flower \({}^{\mathbf{2}}\) & 1452/1453 & MS, RI \\  & **Total others** & **2.72 \(\pm\) 0.20** & **4.15 \(\pm\) 0.70** & & \\ \hline \hline \end{tabular}  
\({}^{\mathbf{a}}\) Relative content: the material peak area/internal standard peak area (based on triplicate analyses). \({}^{\mathbf{b}}\) Aroma description \({}^{\mathbf{1}}\) means the compounds found in references [29], \({}^{\mathbf{2}}\) means the compounds found in the Flavoret database ([[https://www.flavornet.org/flavormet.html](https://www.flavornet.org/flavormet.html)]([https://www.flavornet.org/flavormet.html](https://www.flavornet.org/flavormet.html)), accessed on 26 July 2021), \({}^{\mathbf{3}}\) means the compounds found in femaflawor ([[https://www.femaflawor.org/flavor-library](https://www.femaflawor.org/flavor-library)]([https://www.femaflawor.org/flavor-library](https://www.femaflawor.org/flavor-library)), accessed on July 28 2021), \({}^{\mathbf{4}}\) means the compounds found in references [39]. \({}^{\mathbf{ RI}}\) (RI) (-) retention index of compounds calculated using the homologous series of n-alkanes. \({}^{\mathbf{d}}\) RI (ref): the published retention index of compounds in NIST 14 library. \({}^{\mathbf{e}}\) \({}^{\mathbf{1}}\) method: MS, mass spectrum comparison using NIST 14 library; RI, retention index in agreement with literature values.  
\end{table}