# From Vine to Wine: Non-Colored Flavonoids as Fingerprints
## 3 Results
### Multivariate Analysis  
#### 3.3.1 Principal Compound Analysis  
Principal compound analysis (PCA) was performed to reduce the complexity of the non-visible flavonoid dataset, encompassing both directly measured and calculated parameters. After applying Varimax rotation to minimize the influence of overlapping variables on each factor, five factors were extracted with eigenvalues \(\geq\)1, collectively accounting for 80.0% of the total variance. The first factor, explaining 43.3% of the variance, \begin{table}
\begin{tabular}{c c c c c c c c c c c c c c} \hline \hline  & **Cate** & **Epic** & **M3 gu** & **M3 gl** & **L3 gl** & **K3 gl** & **Myri** & **Q3 gu** & **Q3 gl** & **Ruti** & **I3 gl** & **Isor** & **S3 gl** & **Quer** \\ \hline \multirow{2}{*}{Cate} & \multirow{2}{*}{\(1\)} & 0.430 & 0.069 & \(-\)0.234 & 0.253 & 0.179 & 0.341 & 0.222 & 0.098 & 0.339 & 0.400 & 0.340 & 0.287 & 0.151 \\  & & ** & ** & ** & ** & ** & ** & ** & ** & ** & ** & ** & ** \\ \hline \multirow{2}{*}{Epic} & 0.000 & \multirow{2}{*}{\(1\)} & 0.080 & \(-\)0.038 & 0.040 & 0.022 & 0.049 & 0.056 & 0.004 & 0.118 & 0.267 & 0.334 & \multirow{2}{*}{\(-\)0.022} & 0.277 \\  & & & & & & & & & & & ** & ** & ** \\ \hline \multirow{2}{*}{M3 gu} & 0.326 & 0.255 & \multirow{2}{*}{\(1\)} & \multirow{2}{*}{\(-\)0.072} & 0.196 & \multirow{2}{*}{\(0.098\)} & 0.058 & 0.089 & 0.149 & \multirow{2}{*}{\(-\)0.053} & 0.131 & 0.191 & 0.069 & 0.140 \\  & & & & & & & & & & & ** & ** & 0.069 & 0.140 \\ \hline \multirow{2}{*}{M3 gl} & 0.001 & 0.591 & 0.302 & \multirow{2}{*}{\(1\)} & \multirow{2}{*}{\(-\)0.136} & \multirow{2}{*}{0.096} & \multirow{2}{*}{0.001} & 0.220 & 0.250 & \multirow{2}{*}{\(-\)0.002} & \multirow{2}{*}{\(-\)0.059} & \multirow{2}{*}{\(-\)0.157} & \multirow{2}{*}{\(-\)0.226} & \multirow{2}{*}{\(0.042\)} \\  & & & & & & & & & & ** & & ** & ** & 0.042 \\ \hline \multirow{2}{*}{L3 gl} & 0.000 & 0.568 & 0.005 & 0.052 & \multirow{2}{*}{\(1\)} & 0.233 & 0.423 & 0.308 & 0.150 & 0.457 & 0.293 & 0.253 & 0.237 & 0.065 \\  & & & & ** & ** & ** & & & & ** & ** & ** & ** & 0.065 \\ \hline \multirow{2}{*}{K3 gl} & 0.010 & 0.758 & 0.162 & 0.172 & 0.001 & \multirow{2}{*}{\(1\)} & 0.084 & 0.042 & \multirow{2}{*}{\(-\)0.099} & 0.184 & \multirow{2}{*}{\(0.113\)} & 0.054 & 0.240 & \multirow{2}{*}{\(0.063\)} \\  & & & & & & & & & & & ** & & & 0.063 \\ \hline \multirow{2}{*}{Myri} & 0.000 & 0.489 & 0.409 & 0.990 & 0.000 & 0.232 & \multirow{2}{*}{\(1\)} & 0.832 & 0.638 & 0.733 & 0.573 & 0.427 & 0.243 & \multirow{2}{*}{\(0.076\)} \\  & & & & & & & & & ** & & ** & & ** & 0.076 \\ \hline \multirow{2}{*}{Q3 gu} & 0.001 & 0.426 & 0.207 & 0.002 & 0.000 & 0.551 & 0.000 & \multirow{2}{*}{\(1\)} & 0.900 & 0.607 & 0.684 & 0.473 & 0.149 & 0.271 \\  & & & & & & & & & & ** & & ** & & ** & ** \\ \hline \multirow{2}{*}{Q3 gl} & 0.163 & 0.960 & 0.033 & 0.000 & 0.032 & 0.157 & 0.000 & 0.000 & 1 & 0.293 & 0.546 & 0.374 & 0.048 & 0.297 \\  & & & & & & & & & & ** & & ** & ** & \\ \hline \multirow{2}{*}{Ruti} & 0.000 & 0.091 & 0.452 & 0.981 & 0.000 & 0.008 & 0.000 & 0.000 & 1 & 0.471 & 0.334 & 0.220 & \multirow{2}{*}{\(-\)0.010} \\  & & & & & & & & & & & ** & ** & ** & \\ \hline \multirow{2}{*}{I3 gl} & 0.000 & 0.000 & 0.061 & 0.405 & 0.000 & 0.107 & 0.000 & 0.000 & 0.000 & 0.000 & 1 & 0.877 & 0.309 & 0.524 \\  & & & & & & & & & & & ** & ** & ** \\ \hline \multirow{2}{*}{Isor} & 0.000 & 0.000 & 0.006 & 0.025 & 0.000 & 0.439 & 0.000 & 0.000 & 0.000 & 0.000 & 1 & 0.233 & 0.591 \\  & & & & & & & & & & & ** & ** & ** \\ \hline \multirow{2}{*}{S3 gl} & 0.000 & 0.753 & 0.327 & 0.001 & 0.001 & 0.001 & 0.000 & 0.033 & 0.496 & 0.002 & 0.000 & 0.001 & 1 & 0.112 \\  & & & & & & & & & & & & & \\ \hline \multirow{2}{*}{Quer} & 0.031 & 0.000 & 0.045 & 0.545 & 0.355 & 0.372 & 0.281 & 0.000 & 0.000 & 0.890 & 0.000 & 0.000 & 0.109 & 1 \\ \hline \end{tabular}
\end{table} 
Table 4: Correlations among the flavonoid concentrations (in mg/L) obtained in the red wine analyzed. was strongly associated with TFlo and GFlo, and to a lesser extent with Qder and Mder.