Using CNC(=O)c1c(I)oc2cc(NS(C)(=O)=O)c(Br)cc12, O=C([O-])[O-] to produce CNC(=O)c1c(I)oc2cc(N(C)S(C)(=O)=O)c(Br)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.