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(a)

(b)

(c)

(d)

(e)

(f)

Figure 4: Deconvolution of the experimental absorption spectrum of silybin for 39 wavelengths into spectra of the individual variously protonated species $\text{L}\text{,}$$\text{LH}\text{,}$$\text{L}{\text{H}}_2\text{,}$$\text{L}{\text{H}}_3\text{,}$$\text{L}{\text{H}}_4$ in solution (above) and the statistical analysis of the residuals (below) of each particular absorption spectrum for a selected value of pH equal to: (a) 12.2, (b) 11.8, (c) 10.2, (d) 9.0, (e) 7.4, and (f) 6.3. The charges of the species are omitted for the sake of simplicity (SQUAD, ORIGIN).