Using O=C([O-])[O-], COC(=O)c1nc(Br)cc(Br)c1OCc1ccccc1 to produce COc1cc(Br)nc(C(=O)O)c1OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.