Using C[N+]1([O-])CCOCC1, COC(=O)c1ccc(S(C)(=O)=O)c(CBr)c1C to produce COC(=O)c1ccc(S(C)(=O)=O)c(C=O)c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.