Figure 1

(a) Chemical structure of Erdosteine (ERD), (b) Absorption spectra of the reaction product of 0 (Blank),1, 2, 3, 4, 5 and 6 μg/mL of ERD with potassium permanganate in alkaline medium.

(a) Chemical structure of Erdosteine (ERD), (b) Absorption spectra of the reaction product of 0 (Blank),1, 2, 3, 4, 5 and 6 μg/mL of ERD with potassium permanganate in alkaline medium.