## 3 Results and Discussion
### Odorants in Fresh Shitiake Mushrooms
#### 3.1.2 Odorants Identified by DSE-SAFE
\begin{table}
\begin{tabular}{c c c c c c c c c c c} \hline \hline
**No.** & **Compound** & **CAS** & **Odor \({}^{\star}\)** & **ID \({}^{\star}\)** & \multicolumn{2}{c}{**RI \({}^{\star}\)**} & \multicolumn{2}{c}{**DF \({}^{\star}\)**} & \multicolumn{2}{c}{**FD \({}^{\star}\)**} \\ \cline{6-10}  & & & & & & & **Wax** & **HP-S** & **Fresh** & **Dried** & **Fresh** & **Dried** \\ \hline
1 & 2-Methyl-1-propanol & 78-84-2 & chocolate & RLO,S & 743 & \textless{}700 & - & - & 27 & 3 \\
2 & Ethy Lacrete & 141-78-6 & pineople & RINGS,S & 887 & - & - & - & 27 & 27 \\
3 & 3-Methyl-butanol & 590-86-3 & chocolate & RINGS,S & 919 & \textless{}700 & 8 & 8 & 243 & 243 \\
4 & 2,3-Butanucle & 431-03-8 & sweet, cream & RINGS,S & 980 & - & - & 2 & - & 3 \\
5 & Dimethyl disulfide & 642-92-0 & cabbage & RINGS,S & 1069 & 747 & - & - & - & 9 \\
6 & 3-Octanone & 106-68-3 & mushroom & RINGS,S & 1251 & 988 & 8 & 4 & 3 & 3 \\
7 & Octanal & 124-13-0 & citrus-like & RINGS,S & 1286 & 1006 & 6 & - & 3 & - \\
8 & 1-Octen-3-one & 4312-99-6 & mushroom & RINGS,S & 1289 & 965 & 8 & 81 & 3 \\
9 & 2-Acetyl-1-pyrroline & 8253-25-25 & popcorn-like & RLO & 1320 & 904 & 8 & 8 & 1 & 1 \\
10 & 1-Hexanol & 111-27-3 & sweet, oily & RINGS,S & 1351 & - & - & - & 3 & 27 \\
11 & Dimethyl disulfide & 3658-80-8 & sulfury & RINGS,S & 1365 & 962 & - & 8 & - & 81 \\
12 & (E)-2-Oden & 2548-87-0 & fatty, nuty & RINGS,S & 1410 & 1064 & - & 9 & - \\
13 & Unknown & - & grass, beauty & O & 1428 & - & 8 & 8 & 243 & - \\
14 & Acetic acid & 64-19-7 & vinega-like & RINGS,S & 1432 & \textless{}700 & - & - & 1 & 81 \\
15 & 3-Methyl-thiopnal & 3268-93 & cooked & RINGS,S & 1472 & - & 8 & 8 & 243 & 3 \\
16 & 1-Octen-3-ol & 391-64 & mushroom & RINGS,S & 1456 & 977 & 8 & 8 & 81 & 1 \\
17 & 2-Ethyl-1-hexanol & 104-76-7 & fresh, fatty & RINGS,S & 1482 & 1031 & 2 & 8 & - & 9 \\
18 & 2-Ewalddehyde & 105-52-7 & almond, green & RINGS,S & 1512 & 920 & 8 & 8 & 3 & 1 \\
19 & (E)-2-Noncal & 1882-56-6 & fatty, green & RINGS,S & 1524 & 1156 & - & 6 & 1 & 1 \\
20 & 1-Octanol & 111-87-5 & green, fresh & RINGS,S & 1545 & 1070 & - & - & 1 & - \\
21 & (E)-2-Oden-1-ol & 1840-17-1 & grass & RINGS,S & 1614 & - & 8 & 8 & - & - \\
22 & Butanucle acid & 107-92-6 & cheese, fecal & RINGS,S & 1620 & 797 & 6 & 6 & - & 1 \\
23 & Previouslyaldehyde & 122-78-1 & floral & RINGS,S & 1633 & 1041 & 8 & 8 & 729 & 81 \\
24 & Isovalier acid & 505-74-2 & sweaty & RINGS,S & 1673 & 843 & - & 8 & 27 & 81 \\
25 & 3-Methyl-1-propnal & 505-10-2 & cabbage & RINGS,S & 1709 & - & 8 & 6 & 3 & 27 \\
26 & 1,2-Hithithine & 228-16-7 & mushroom & RINGS,O & 1721 & 1093 & 4 & 4 & 3 & 3 \\
27 & Pertanoic acid & 109-52-4 & sweaty, racid & RINGS,S,S & 1744 & - & 4 & - & - \\
28 & Dimethyl tetra-sulfide & 5756-24-1 & mushroom & RINGS,S & - & 1205 & 4 & 6 & 243 & 729 \\
29 & Unknown & - & rubber & O & 1787 & - & 3 & - & - & - \\
30 & Phenylethyl alcohol & 60-12-8 & honey & RINGS,S & 1897 & 1119 & - & 6 & 81 & 27 \\
31 & Unknown & 699-10-5 & mushroom & MSO & 1953 & - & 3 & - & 1 & 3 \\
32 & _trans_-4-5-Epoxy-(E)-2 & decanal & 134454-31-2 & metallic & RINGS,S & 1994 & 1383 & 8 & - & 729 & - \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Odorants determined in fresh and hot-air-dried shiltake mushrooms by HS-SPME and DSE-SAFE combined with DFA and AEDA.