## 2 Results and Discussion
\begin{table}
\begin{tabular}{c c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Compound**} & \multicolumn{2}{c}{**Flavor**} & \multirow{2}{*}{**R\({}_{\text{IIt}}\)**} & \multirow{2}{*}{**R\({}_{\text{calc}}\)** “Filina”**} & \multirow{2}{*}{**“Gergana” \(\times\) (Ufo-4”**} & \multicolumn{2}{c}{**“July**} & \multirow{2}{*}{**“Laskava”**} & \multicolumn{2}{c}{**“Flat**} & \multirow{2}{*}{**“Evmolpiya”**} & \multicolumn{2}{c}{**“[PERSON]**} \\  & \multicolumn{2}{c}{**Contribution \(\ast\ast\)**} & & & & & & & & & \\ \hline \multicolumn{11}{l}{**Aldehydes**} \\ \hline Pentanal & FB & 738 & 741 & 0.70\({}^{\ast}\) & 1.17 & 0.25 & 1.09 & 1.14 & 1.54 & 0.80 & 0.99 \\ Hexanal & FFr & 800 & 798 & 1.95 & 6.55 & 3.20 & 7.13 & 4.40 & 2.68 & 2.24 & 5.57 \\ (E)-2- & \(\text{N}/\text{A}\) & 849 & 850 & 2.83 & 4.00 & 1.35 & 2.04 & 7.36 & 5.30 & 3.26 & 6.40 \\ Heptanal & CF & 907 & 909 & 4.35 & 1.47 & 1.58 & 1.38 & 1.14 & 3.95 & 3.00 & 1.25 \\ Benzaldehyde & FSw & 948 & 946 & 0.71 & 0.49 & 0.53 & 0.46 & 0.48 & 0.65 & 0.82 & 0.42 \\ (E)-2- & FW & 960 & 960 & 0.51 & 0.35 & 1.64 & 1.42 & 1.49 & 0.46 & 0.58 & 1.30 \\ Heptanal & CF & 999 & 1000 & 1.06 & 0.73 & 0.79 & 0.68 & 0.71 & 0.97 & 1.22 & 0.62 \\ (E)-2- & \(\text{FW}\) & 1051 & 1047 & 1.43 & 0.98 & 0.59 & 3.12 & 3.26 & 1.30 & 1.65 & 2.83 \\ \(\text{2-methyl-}\) & \(\text{FB}\) & 1070 & 1073 & 0.83 & 0.57 & 0.53 & 0.46 & 1.71 & 0.76 & 0.96 & 1.49 \\ \(\text{4-methyl-}\) & \(\text{FB}\) & 1084 & 1085 & 0.24 & 0.16 & 1.44 & 1.25 & 1.31 & 0.21 & 0.27 & 1.14 \\ \(\text{Benzaldehyde}\) & \(\text{CW}\) & 1102 & 1104 & 3.89 & 2.21 & 2.37 & 2.06 & 1.99 & 3.54 & 1.48 & 1.88 \\ (E)-2- & \(\text{CW}\) & 1160 & 1159 & 1.57 & 1.07 & 2.42 & 2.10 & 2.20 & 1.42 & 1.80 & 1.91 \\ Decanal & CW & 1204 & 1205 & 0.39 & 0.27 & 0.28 & 0.25 & 0.26 & 0.35 & 0.44 & 0.23 \\ (E)-2- & \(\text{FW}\) & 1250 & 1253 & 0.31 & 0.22 & 1.50 & 1.30 & 1.36 & 0.29 & 0.36 & 1.18 \\ \(\text{Decanal}\) & \(\text{Total}\) & & & _20.77_ & _20.24_ & _18.47_ & _24.74_ & _28.81_ & _23.42_ & _18.88_ & _27.21_ \\ _allehydes_ & & & & & & & & & & & \\ \hline \multicolumn{11}{l}{**Ketones**} \\ \hline
3-Octanone & N/A & 975 & 977 & 0.71 & 0.49 & 0.52 & 0.45 & 0.25 & 0.64 & 0.82 & 0.41 \\ 2-Octanone & NH & 991 & 992 & 0.56 & 0.38 & 0.41 & 0.36 & 0.14 & 0.51 & 0.64 & 0.32 \\ \(\text{\gamma-}\) & FSw & 1045 & 1045 & 0.29 & 0.20 & 0.21 & 0.19 & 0.42 & 0.26 & 0.33 & 0.17 \\ 2- & \(\text{FW}\) & 1090 & 1088 & 0.64 & 0.44 & 0.47 & 0.41 & 0.14 & 0.58 & 0.73 & 0.37 \\ \(\text{\gamma-}\) & \(\text{SV}\  
\begin{table}
\begin{tabular}{l c c c c c c c c c c c} \hline \hline
**Compound** & \multicolumn{2}{c}{**Flavor**} & \multicolumn{2}{c}{**Flilt**} & \multicolumn{2}{c}{**Flilt**} & \multicolumn{2}{c}{**Flaina**} & \multicolumn{2}{c}{**\#Cergana**} & \multicolumn{2}{c}{**\#Ufo-4**} & \multicolumn{2}{c}{**\#July**} & \multicolumn{2}{c}{**\#Laskava**} & \multicolumn{2}{c}{**\#Tat**} & \multicolumn{2}{c}{**\#Evmolpiya**} & \multicolumn{2}{c}{**\#Morsani**} \\ \hline
**Fatty Acids** & & & & & & & & & & & & \\ \hline Butanoic & SW & 759 & 760 & 1.99 & 1.36 & 3.31 & 2.88 & 3.01 & 1.81 & 2.29 & 2.62 \\ acid & & & & & & & & & & & \\
2-methyl- & & & & & & & & & & & \\ Pentanoic & FSw & 926 & 924 & 1.77 & 2.72 & 2.93 & 2.55 & 2.66 & 1.61 & 2.03 & 2.31 \\ acid & & & & & & & & & & & \\ Octanoic & & & & & & & & & & & \\ acid & & & & & & & & & & \\ Nonanoic & NH & 1270 & 1272 & 2.98 & 2.05 & 2.20 & 1.91 & 1.20 & 2.71 & 3.43 & 1.74 \\ \(n\)-Decanoic & & & & & & & & & & & \\ acid & & & & & & & & & & & \\ Dodecanoic & FC & 1558 & 1559 & 3.25 & 2.23 & 2.40 & 2.08 & 1.18 & 2.95 & 3.74 & 1.89 \\ \(n\)- & & & & & & & & & & & \\ Hexadecanoic & FC & 1960 & 1960 & 1.30 & 0.89 & 0.96 & 0.83 & 0.49 & 1.18 & 1.49 & 0.76 \\ acid & & & & & & & & & & & \\ _Total fatty_ & & & & & _18.15_ & _16.98_ & _23.06_ & _20.04_ & _13.14_ & _16.5_ & _20.87_ & _18.22_ \\ _acids_ & & & & & & & & & & & \\ \hline
Aldehydes comprise 21% of the identified compounds, with the dominance of hexanal, (E)-2-hexenal, and nonanal in all peach varieties (Table 1).