## 3 Resultsand Discussions
### Chemical Composition of Peach Pomace
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Polyphenols** & **Flavonoids** & **Anthocyanins** & **Sugars** & **RSA** \\
**(mg GAE 100 g\({}^{-1}\))** & **(mg RE 100 g\({}^{-1}\))** & **(mg C3G 100 g\({}^{-1}\))** & **(g GLuE 100 g\({}^{-1}\))** & **(\%)** \\ \hline
1771.64 \(\pm\) 48.07 & 478.99 \(\pm\) 32.29 & 21.18 \(\pm\) 0.98 & 35.38 \(\pm\) 0.69 & 40.41 \(\pm\) \\  & & & & 0.66 \\ \hline \hline \end{tabular} RSA = radical scavenging activity.  
\end{table} 
Table 1: DPPH inhibitory activity and total polyphenol, flavonoid, and anthocyanin content of peach pomace. in other studies, variations of chlorogenic acid are highlighted, ranging from 15.96 mg g\({}^{-1}\)[26], 0.41-0.51 mg 100 g\({}^{-1}\)[33], and 2944 mg g\({}^{-1}\)[29]. Neochlorogenic acid and caffe acid showed a level of 0.82 mg 100 g\({}^{-1}\) and 0.11 mg 100 g\({}^{-1}\), respectively. In other studies, the level of caffe acid was higher, ranging from 0.21 to 0.41 mg 100 g\({}^{-1}\)[33] and 0.98 mg g\({}^{-1}\)[26]. Sinapic acid was noted in peach pomace, at a concentration of 2.70 mg 100 g\({}^{-1}\). Regarding the flavonoid class, myricetin emphasized a content of 1.49 mg 100 g\({}^{-1}\), while rutin recorded the highest concentration (8.12 mg 100 g\({}^{-1}\)) among all the phenolic compounds analyzed. Rutin exhibits a diverse range of pharmacological properties that are utilized in medicine and human nutrition [34]. Although it is traditionally used as an antimicrobial, antifungal, and antiallergic agent, studies have also demonstrated its efficacy in treating chronic conditions such as cancer, diabetes, hypertension, and hypercholesterolemiaemia [34; 35]. In conclusion, the phenolic profile of peach pomace revealed the presence of valuable compounds, with the predominance of ellagic acid, chlorogenic acid, and rutin. These results confirm the potential of pomace as a source of bioactive compounds, usable in functional food products. In further characterizing the phenolic compounds of peach pomace, in order to analyze the chemical structure and its biological potential, a determination was performed by FTIR spectroscopy. This method allowed the identification of functional groups and characteristic chemical bonds. FTIR measurements (Table 3, Figure 3) were performed in the range of 400-4000 cm\({}^{-1}\), providing additional information about the chemical composition of the pomace. Several absorption bands are observed in different regions of the spectrum, each corresponding to specific vibrations of chemical bonds in a compound. The absorption band located at approximately 3400 cm\({}^{-1}\) corresponds to -OH stretching vibrations, characteristic of water, alcohols, polyphenols, cellulose, and pectins [36]. The spectral band located approximately from \(\sim\)2920 to \(\sim\)2850 cm\({}^{-1}\) is associated with the C-H stretching vibration and is characteristic of waxes, lipids, aliphatic chains in lignin [37]. The bands around the values of \(\sim\)1740-1700 cm\({}^{-1}\) are characteristic of C=O (carbonyl) groups in carboxylic acids, esters, and aldehydes [38]. The band at approximately 1600 cm\({}^{-1}\) is characteristic of C=C vibrations in aromatic structures [39]. \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline  & & & & & & & \\ \hline Gallic acid & Ellagic acid & Neochlorogenic acid & Chlorogenic acid & Caffeic acid & Sinapic acid & Myricetin & Rutin \\ \hline
1.32 \(\pm\) 0.20 & 2.05 \(\pm\) 0.06 & 0.82 \(\pm\) 0.08 & 3.77 \(\pm\) 0.23 & 0.11 \(\pm\) 0.02 & 2.70 \(\pm\) 0.20 & 1.49 \(\pm\) 0.15 & 8.12 \(\pm\) 0.21 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Concentration of phenolic compounds in peach pomace.