Using [O-][I+3]([O-])([O-])[O-], O=C(O)c1cc(Br)cc2c1NCCS2 to produce O=C(O)c1cc(Br)cc2c1NCCS2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.