## 2 Results and Discussion
\begin{table}
\begin{tabular}{l c c c c c c c c c} \hline \hline
**\#** & **Compound** & **KI** & **AIQ** & **AIQ** & **AIQ** & **AIQ** & **AIQ** & **  
\begin{table}
\begin{tabular}{l l c c c c c c c c} \hline \hline \multicolumn{1}{c}{**\#**} & **Compound** & **K1** & **F00** & **F01** & **F02** & **F03** & **F04** & **F05** & **F06** \\ \hline
1 & Medify acute \({}^{*}\) & 698 & 0.09 \(\pm\) 0.08 \({}^{*}\) & 1.24 \(\pm\) 0.08 \({}^{*}\) & 1.23 \(\pm\) 0.07 \({}^{*}\) & 4.77 \(\pm\) 0.05 \({}^{*}\) & 5.86 \(\pm\) 0.05 \({}^{*}\) & 4.64 \(\pm\) 0.04 \({}^{*}\) & 1.51 \(\pm\) 0.02 \({}^{*}\) \\
2 & Inappropriately acute & 575 & 0.05 \(\pm\) 0.00 \({}^{*}\) & 0.01 \(\pm\) 0.00 \({}^{*}\) & 0.27 \(\pm\) 0.03 \({}^{*}\) & 0.98 \(\pm\) 0.07 \({}^{*}\) & 0.94 \(\pm\) 0.06 \({}^{*}\) & 0.52 \(\pm\) 0.06 \({}^{*}\) & 0.27 \(\pm\) 0.03 \({}^{*}\) \\
3 & Buonard Acid, methyl ester \({}^{*}\) & 724 & 0.08 \(\pm\) 0.04 \({}^{*}\) & 0.47 \(\pm\) 0.05 \({}^{*}\) & 12.5 \(\pm\) 0.04 \({}^{*}\) & 16.25 \(\pm\) 0.01 \({}^{*}\) & 21.24 \(\pm\) 1.19 \({}^{*}\) & 18.558 \(\pm\) 0.08 \({}^{*}\) & 32.68 \(\pm\) 0.03 \({}^{*}\) \\
4 & Buonard Acid, methyl ester \({}^{*}\) & 703 & 0.02 \(\pm\) 0.00 \({}^{*}\) & 0.10 \(\pm\) 0.00 \({}^{*}\) & 0.00 \(\pm\) 0.07 \({}^{*}\) & 0.51 \(\pm\) 0.00 \({}^{*}\) & 0.82 \(\pm\) 0.04 \({}^{*}\) & 0.54 \(\pm\) 0.04 \({}^{*}\) & 0.60 \(\pm\) 0.03 \({}^{*}\) \\
5 & Methyl/sucsucces & 703 & 0.06 \(\pm\) 0.00 \({}^{*}\) & 0.01 \(\pm\) 0.00 \({}^{*}\) & 0.13 \(\pm\) 0.04 \({}^{*}\) & 0.61 \(\pm\) 0.03 \({}^{*}\) & 0.24 \(\pm\) 0.02 \({}^{*}\) & 0.38 \(\pm\) 0.00 \({}^{*}\) & 0.74 \(\pm\) 0.09 \({}^{*}\) \\
6 & Buonard acid, ethyl ester \({}^{*}\) & 810 & 0.07 \(\pm\) 0.01 \({}^{*}\) & 0.01 \(\pm\) 0.01 \({}^{*}\) & 0.04 \(\pm\) 0.00 \({}^{*}\) & 0.98 \(\pm\) 0.03 \({}^{*}\) & 0.38 \(\pm\) 0.02 \({}^{*}\) & 14.64 \(\pm\) 2.01 \({}^{*}\) \\
7 & CylcopThe alkane family may also provide information on the maturity of strawberry fruits of the Festival variety. Tetradecane was the most abundant compound in the Festival variety at the FE0 stage and Nonadecane was the most abundant compound in stages FE1 and FE2. This is in accordance with observations from the work reported by [PERSON], et al. [24] describing the group of alkanes that impact the aroma of certain strawberries in initial stages of maturation. Hexadecane reaches its highest concentration during the FE1 stage, making it another key compound in this stage of maturity, and its presence in high quantities indicates immature fruits. It has been reported that these compounds of the alkane family are responsible for herbaceous notes characteristic of fruits that have not finished developing [21]. The implications of having identified possible volatile markers of specific stages of maturation are quite promising, since they allow them to be a reference point for the agronomic management for cultivation. For the Frontera variety, the VOC with the highest concentration in the FR0 stage was cyclohexane, 1,1,2-trimethyl. The presence of this compound has been reported in other strawberries at initial maturation stages when 100% of the fruit surface is green and is related to an herbaceous aroma [25]. In FR1, the most abundant compound was methyl acetate, which has been identified in varieties of wild strawberry and gives a floral note to those fruits [26]. In the FR3-FR5 stages, the most abundant compound was most abundant was 1-butanol, 2-methyl-, acetate; this compound has an impact on the aroma of strawberry fruits in late stages of maturation and has been previously identified in other strawberry varieties such as Camarosa [27]. Finally, in stage FR6, hexanoic acid methyl ester was the VOC with the highest concentration, which indicates that this compound is closely related to the aroma of mature strawberries (Table 3). In the Frontera variety, the VOCs that define the earliest maturation stages were terpenes. Surprisingly the majority of these reached their maximum concentration when the fruit's surface was still 100% green.