“ PBSA showed strong oxidizing properties when UV irradiated in … solution (pH 7.4) in the presence of cysteine , glutathione and azide, as evidenced by the detection of the corresponding S‐cysteinyl, glutathiyl and azidyl … with the aid of the spin trap, 5,5‐dimethyl‐1‐pyrroline N‐oxide (DMPO).”