Data Drop

4-hydroxyphenylacetic acid (HPA) data

(Figure 1) Cyclic Voltammetry of 2 mM HPA in pH 7 buffer

ESR spectra insert

tert-butyl-4-hydroxyanisole (BHA) data

(Figure 2) Cyclic Voltammetry of 1 mM BHA, 0.75 mM KNO3 in 30% dioxane - pH 7 buffer

ESR Spectra insert

(Figure 3)