We first examined data obtained at a single temperature to reduce complexity and allow the effect of time and solvent to be studied independently of temperature. At 110 °C these effects are pronounced and highlight important trends. Indeed, PCA shows clear differences between solvents (Fig. ). For PCA plots including all times and temperatures see the supporting information. The insets show the loadings for the first two principal components (PC1 and PC2) as vectors, describing the contribution of the different compounds to the patterns seen in the corresponding scores plots.