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The oxygenation of p-anisidine by G4DFsc (top) and 3His-G4DFsc (bottom) in the presence of two equivalents of Fe(II). No reaction is observed in the presence of G4DFsc, but in the 3His-G4DFsc reaction, an absorption feature at 360 nm is observed to grow in and then decay (inset, black triangles) followed by the appearance of a strong absorption feature at 445 nm (inset, red circles) arising from the formation of 4-nitrosodiphenylamine.
