## 3 Results and Discussion
### Alcohols
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multicolumn{2}{c}{**Classes of**} & \multicolumn{2}{c}{**Pr. _ergugii_**} & \multicolumn{2}{c}{_P. ostreatus_} \\ \cline{3-6} \multicolumn{1}{c}{**Compounds**} & \multicolumn{1}{c}{**Rt**} & \multicolumn{1}{c}{**Raw**} & \multicolumn{1}{c}{**Roasted**} & \multicolumn{1}{c}{**Raw**} & \multicolumn{1}{c}{**Roasted**} \\ \hline \multirow{6}{*}{Ketones} & 2-heptanone & 5.95 & n.d. & n.d. & n.d. & 15.28 \(\pm\) 13.38 \\  & 3-octanone & 6.75 & 36.80 \(\pm\) 5.36 & 9.53 \(\pm\) 5.71 & 310.7 \(\pm\) 125.3 & 25.08 \(\pm\) 12.30 \\  & 2-octanone & 7.09 & 4.68 \(\pm\) 2.52 & 6.60 \(\pm\) 2.21 & n.d. & 7.31 \(\pm\) 9.03 \\  & 2,3-octanedione & 7.50 & n.d. & n.d. & 1.21 \(\pm\) 0.37 & n.d. \\  & 3-octen-2-one & 8.71 & 7.04 \(\pm\) 6.87 & n.d. & n.d. & n.d. \\ \hline Aromatic & \multirow{2}{*}{toluene} & 4.58 & 14.22 \(\pm\) 5.26 & 60.73 \(\pm\) 11.50 & 90.62 \(\pm\) 12.05 & 27.20 \(\pm\) 8.27 \\ \hline \multirow{6}{*}{Ketones} & methylpyrazine & 6.83 & n.d. & n.d. & n.d. & 0.63 \(\pm\) 0.18 \\  & 2,5- & 7.60 & n.d. & 4.33 \(\pm\) 0.86 & n.d. & 5.44 \(\pm\) 3.39 \\  & dimethylpyrazine & & & & & \\  & 2,6- & 7.69 & n.d. & 1.92 \(\pm\) 1.14 & n.d. & 3.09 \(\pm\) 1.94 \\  & dimethylpyrazine & 7.75 & n.d. & n.d. & n.d. & 0.79 \(\pm\) 0.51 \\  & 2,3- & 7.85 & n.d. & 0.89 \(\pm\) 0.41 & n.d. & 0.78 \(\pm\) 0.56 \\  & dimethylpyrazine & & & & & \\  & 2-ethyl- & 8.59 & n.d. & 3.69 \(\pm\) 0.43 & n.d. & 4.45 \(\pm\) 2.98 \\  & methylpyrazine & & & & & \\  & 2,6- & 9.12 & n.d. & n.d. & n.d. & 1.76 \(\pm\) 0.88 \\  & diethylpyrazine & & & & & \\  & 3-ethyl-2,5- & 9.30 & n.d. & 8.76 \(\pm\) 0.31 & n.d. & 21.22 \(\pm\) 5.11 \\ Pyrazines & dimethylpyrazine & & & & & \\  & 2-ethyl-3,5- & 9.52 & n.d. & 2.85 \(\pm\) 0.10 & n.d. & 6.00 \(\pm\) 2.36 \\  & trimethylpyrazine & 9.53 & n.d. & n.d. & n.d. & 0.56 \(\pm\) 0.06 \\  & 2-methyl-5- & 9.71 & n.d. & n.d. & n.d. & 0.67 \(\pm\) 0.25 \\  & 3,5-diethyl-2- & & & & & \\  & methyl & 10.07 & n.d. & n.d. & n.d. & 5.94 \(\pm\) 1.85 \\  & pyrazine & & & & & \\  & 2,3,5-trimethyl- & & & & & \\  & 6-ethylpyrazine & 10.40 & n.d. & n.d. & n.d. & 2.40 \(\pm\) 0.47 \\  & 2,5-dimethyl-3- & & 10.60 & n.d. & n.d. & n.d. & 1.81 \(\pm\) 0.51 \\  & 2-isoamyl-6- & & & & & \\  & methylpyrazine & & & & & \\  & 2-butyl-3,5- & & & & & \\  & dimethyl & 12.94 & n.d. & n.d. & n.d. & 4.49 \(\pm\) 1.23 \\  & pyrazine & & & & & \\  & 2,5-dimethyl-3- & & & & & \\  & propenylyrazine & & & & & \\ \hline Sulfur & dimethyl & 4.82 & n.d. & n.d. & n.d. & 2.67 \(\pm\) 2.19 \\ compounds & disulfide & & & & & \\  & methional & 9.35 & n.d. & 1.96 \(\pm\) 0.36 & n.d. & 2.59 \(\pm\) 1.62 \\ \hline \multirow{6}{*}{Terpenes} & limonene & 6.16 & 5.21 \(\pm\) 0.56 & 1.07 \(\pm\) 0.41 & 0.30 \(\pm\) 0.01 & n.d. \\  & pristane & 12.98 & 0.18 \(\pm\) 0.02 & n.d. & 4.32 \(\pm\) 3.47 & n.d. \\  & phytane & 15.03 & n.d. & n.d. & 3.94 \(\pm\) 1.49 & n.d. \\ \hline \multirow{6}{*}{Other} & 2,4,5- & & & & & \\  Other & trimethyloxazole & 6.07 & n.d. & n.d. & n.d. & 1.72 \(\pm\) 1.48 \\ \cline{1-1}  & 2-pentyl-furan & 6.47 & 4.43 \(\pm\) 2.31 & 1.50 \(\pm\) 0.32 & 1.05 \(\pm\) 0.48 & 0.51 \(\pm\) 0.36 \\ \cline{1-1}  & 2-acetyl-5 & & 10.92 & n.d. & 3.00 \(\pm\) 0.45 & n.d. & n.d. \\ \cline{1-1}  & 2-acetyllyrrole & 18.71 & n.d. & n.d. & n.d. & 1.66 \(\pm\) 0.56 \\ \hline \hline \end{tabular}  
* Results are presented as averages \(\pm\) SD of three replicates; n.d.; not detected, CS: commercial strains; ICAM: Laboratory of General and Agricultural Microbiology (Agricultural University of Athens, Greece); FAME: fatty acid methyl esters.  
\end{table} 
Table 3: _Cont._