## 6 Valorization Technologies for Avocado-Derived Biomass through Obtaining Bioactive Compounds
### Phenolic Compounds
\begin{table}
\begin{tabular}{l c c c} \hline \hline
**Compound** & **By-Product** & **Compound** & **By-Product** \\ \hline Phenolic alcohol derivatives & & Flavan-3-ols & \\ Hydroxyytrosol glucoside & S & (+)-Catechin & P/S/SC \\ Tyrosol-glucose & S & (-)-Epicatechin & P/S/SC \\ Tyrosol-glucose & S/SC & (Epi)gallocation & S/SC \\
3-hydroxyytrosol & P/S & Isomers 1 and 2 of (epi)catechin glucopyranoside & S/SC \\ Cheuropein & P/S & (Epi)catechin gallate & SC \\ Flavonools & B-Type (epi)catechin dimer, including B1 or B2 & P/S/SC \\ Quercetin & P/S/SC/L & B-Type (epi)catechin trimer & P/S/SC \\ Quercetin-pentoside-hexoside & P & B-Type (epi)catechin tetramer & P/S/SC \\ Quercetin-glucoronide & P & B-Type (epi)catechin pentamer & P/SC \\ Quercetin-3-O-glucose or other hexoside & P/S/SC & B-Type (epi)catechin hexamer & P \\ Quercetin-hexoside & P & A-Type (epi)catechin dimer & S/SC \\ Quercetin-thihexoside & P & A-Type (epi)catechin trimer & S/SC \\ Quercetin-thannoside-pentoside & P & A-Type (epi)catechin tetramer & S/SC \\ Quercetin-3-B-glucose & & Other phenolic compounds & \\ Isomers 1 and 2 of quercetin-diglucoside & SC & Catechol & P/S/SC \\ Isorthametin-glucuron & P & Elagic acid & P/S \\ Ruitin & P/S & Dimethyl ellagic acid hexoside & L \\ Kaempfer & P/S & Pyrogallol or 1,2,3-trihydroxybenzene & P/S/SC \\ Kaempfer-glucuron & P & Vanillin & P/S/SC \\ Flavanones & & Flavalignan isomers & S/SC \\ Namagin & P/S & Non-phenolic compounds & \\ Hesperidin & P/S & Quinic acid & S/SC \\ Hesperetin & P/S & Citric acid & S/SC \\ Narignensin & P/S/SC & Citric acid isomer & S/SC \\ Sakuranetin & S/SC & Mali acid & S/SC \\ _Flarone_ & & Succin acid & S/SC \\ Acacetin neorutinoside & P/S & Penstemide acid & SC \\ Apigenin & P/S/L & Hydroxy abscisic acid glucoside & SC \\ Apigenin-C-hexoside-pentoside & L & Presetol & SC/L \\ \hline \hline \end{tabular}
\end{table} 
Table 6: Phenolic compounds and other compounds characterized in avocado waste according to [80; 81; 84; 89; 90; 91; 92]. Efforts have also been made to generate synergy in new supplements by mixing the antioxidant properties of the stone and peel extracts with other substances to reduce costs, in addition to avoiding the environmental problems that this waste generates. One example is the optimization of the composition of natural additives with antioxidant and antimicrobial effects by adding avocado peel extracts to reduce the amount of nisin used at an industrial level [87]. Another study reported that a lyophilized stone extract can be mixed with egg albumin to minimize the oxidation of oil-in-water emulsions, achieving a 60% decrease in oxidation compared to the 30% obtained when only stone extracts were used. In hamburger meat, the formation of tie-barbituric acid substances (TBARS) was also avoided in 90% [78]. In addition, new forms of presentation are being investigated, such as the possibility that avocado stones can be, as a finished product, in powder form by using spray drying [94]. Wastewater power, also obtained by spray drying, was used as a preservative in pork sausages, being effective in preventing lipid oxidation [20].