## 2 Results
### Analysis of Aroma Components in Golden Mulberry Fruit Across Different Harvesting Stages
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Number**} & \multirow{2}{*}{**Category**} & \multirow{2}{*}{**Compound Name**} & \multirow{2}{*}{**CAS**} & \multicolumn{4}{c}{**Content(\(\mu\)g/kg)**} \\ \cline{4-7}  & & & **T1** & **T2** & **T3** & **T4** \\ \hline
1 & Octanoic acid, methyl ester & 111-11-5 & \(77.07\pm 16.70\) * & \(17.25\pm 0.06\)* & \(4.69\pm 2.70\)* & \(6.15\pm 0.23\)* \\
2 & Butylrolactone & 96-48-0 & \(60.48\pm 0.00\) & - & - & - \\
3 & Tetrabhydrofurfuryl.acrylate & 2399-48-6 & \(53.72\pm 0.00\) & - & - & - \\
4 & 2-Propenoic acid, 2-methyl-, acetyl & 2157-01-9 & \(38.20\pm 1.13\)* & - & \(7.40\pm 0.00\)* & \(5.57\pm 2.54\)* \\
5 & \multirow{2}{*}{**esters**} & Nonanoic acid, methyl ester & 1731-84-6 & \(36.85\pm 2.30\)* & \(7.61\pm 0.32\)* & \(5.32\pm 0.95\)* & \(6.30\pm 0.48\)* \\
6 & & Collaci acid, diallyl ester & 615-99-6 & \(26.68\pm 0.00\)* & \(5.09\pm 0.00\)* & \(311.68\pm 1.31\)* \\
7 & n-Caprotic acid vinyl ester & 3050-69-9 & \(20.75\pm 2.77\)* & - & \(2.89\pm 0.00\)* & \(2.88\pm 0.00\)* \\
8 & Hexadecanoic acid, methyl ester & 112-39-0 & \(19.60\pm 0.15\)* & \(3.82\pm 0.50\)* & \(1.29\pm 0.00\)* & \(2.14\pm 0.73\)* \\
9 & Ethly(E)-hex-3 enyl carbonate & 175397-71-4 & \(186.79\pm 10.24\)* & \(3.51\pm 8.28\)* & \(14.82\pm 7.31\)* & \(10.17\pm 2.03\)* \\
10 & Heptanoic acid, methyl ester & 106-73-0 & \(17.82\pm 0.56\)* & \(4.01\pm 0.81\)* & \(1.72\pm 0.88\)* & \(4.11\pm 0.44\)* \\
11 & Hexanoic acid, methyl ester & 106-70-7 & \(145.22\pm 18.48\)* & \(4.79\pm 3.85\)* & \(18.87\pm 12.90\)* & \(26.41\pm 0.63\)* \\
12 & 3-Hexan-1,0-propanoate, (Z)- & 34567-742- & \(25.24\pm 3.62\)* & \(0.53\pm 0.00\)* & \(6.52\pm 0.00\)* \\
13 & 4-Heptran, (Z)- & 67283-31-0 & \(37.72\pm 3.81\)* & \(22.05\pm 0.00\)* & - & - \\
14 & 3-Buten-1-ol, 2-methyl- & 4516-90-9 & \(35.49\pm 0.00\) & - & - & - \\
15 & Cyclohexan-1, 1-ethynyl- & 1940-18-5 & \(25.42\pm 0.00\)* & \(3.48\pm 0.00\)* & - & - \\
16 & Cyclohexan-3,-diot, tetramethyl- & 90112-64-4 & \(15.46\pm 0.00\) & - & - & - \\
17 & 3-Cyclohexan-1-ol, & 20126-76-5 & \(14.00\pm 1.35\)* & \(3.40\pm 0.00\)* & \(1.20\pm 0.00\)* & \(1.02\pm 0.15\)* \\
18 & 2-Undecan-4-ol & 22381-86-8 & \(13.80\pm 4.27\)* & \(4.89\pm 1.45\)* & \(2.07\pm 1.14\)* & \(1.43\pm 0.00\)* \\
19 & **alcohols** & 2-Pentent-1-ol, (Z)- & 1576-95-0 & \(121.58\pm 6.98\)* & \(26.48\pm 0.64\)* & \(7.85\pm 5.85\)* & \(7.35\pm 0.53\)* \\
20 & 1-Penten-3-ol & 616-25-1 & \(117.32\pm 2.58\)* & \(29.25\pm 108\)* & \(8.64\pm 7.09\)* & \(8.89\pm 0.83\)* \\
21 & 1-Octen-3-ol & 3391-86-4 & \(13.62\pm 1.33\)* & \(8.87\pm 0.93\)* & \(6.99\pm 5.62\)* & \(36.38\pm 2.47\)* \\
22 & 2-Heppiond, (S)- & 60333-24 & \(102.72\pm 0.00\) & - & - & - \\
23 & 2-Heppiond, 3-ol, 45-dimethyl- & 59569-37-1 & - & \(26.08\pm 0.00\) & - & - \\
24 & 6,6-Dimethyl-1,3-heptadiene-5-ol & 81912-03-0 & - & \(15.87\pm 0.00\) & - & - \\
25 & 1-Hexanol & 111-27-3-3 & - & - & \(487.02\pm 6.22\)* & \(54.02\pm 1.79\)* \\
26 & Cyclopentenoid, 2-methyl- & 24007-77-7 & - & - & \(479.06\pm 0.00\) & - & - \\
27 & Cyclohexanol & 108-93-0 & - & - & \(8.28\pm 1.36\)* & \(12.53\pm 0.00\)* \\
28 & Cyclopropane,propyl- & 2415-72-7 & \(164.29\pm 6.67\)* & \(94.09\pm 21.14\)* & - & - \\
29 & 1-Azabicyclo,3-(1.0)hexane & 285-76-7 & \(149.44\pm 7.07\) & \(4.93\pm 0.16\)* & \(6.01\pm 0.00\)* & \(1.16\pm 0.00\)* \\
30 & **alkanes** & Pentane, 2-methoxy- & 6795-88-6 & \(14.03\pm 0.00\)* & \(4.93\pm 0.16\)* & \(0.61\pm 0.00\)* & \(1.16\pm 0.00\)* \\
31 & Bicyclode(2,1,1)-Deptenta, 1,4-dimethyl- & 17065-18-8 & - & \(3.96\pm 0.58\)* & \(17.62\pm 0.00\)* & \(14.49\pm 0.00\)* \\
32 & Pentane, 1-chloro- & 543-59-9 & - & \(4.63\pm 5.22\) & \(15.99\pm 1.87\) \\
33 & 1-Penten-3-one & 1629-58-9 & \(93.46\pm 12.41\)* & \(19.40\pm 4.27\)* & \(3.93\pm 1.67\)* & \(2.30\pm 0.46\)* \\
34 & 3-5-Octaedia-2-one & 38284-74 & \(38.27\pm 4.85\)* & \(10.09\pm 0.00\)* & \(10.04\pm 0.00\)* & \(5.93\pm 0.22\)* \\
35 & **ketones** & 3-Octen-2-one, (E)- & 18402-829 & - & \(2.86\pm 0.00\) & \(1.45\pm 0.00\)* & \(23.40\pm 2.31\)* \\
36 & 2-Methyl/hept+6-en-3-one & 26144-88-7 & - & - & \(22.85\pm 0.00\) & \(22.85\pm 0.00\) \\
37 & 4-Ethyl-2-hexylnal & 71932-97-3 & \(72.81\pm 0.00\)* & - & \(5.45\pm 0.00\)* & - \\
38 & Hexanal & 66-25-1 & 6504.75 \(\pm 25.11\)* & \(2936.5\pm 31.74\)* & \(730.45\pm 39.90\) & - \\
39 & Nonanal & 124-19 To further demonstrate the differences in the aroma components of mulberry fruits across the four maturity periods, a Venn diagram was applied to depict the number of shared and unique characteristic aromas at different maturity stages.