Using Oc1ccccc1, O=C(NCc1cc(Cl)cc(Cl)c1)c1nc(Br)c2cccnc2c1O to produce O=C(NCc1cc(Cl)cc(Cl)c1)c1nc(Oc2ccccc2)c2cccnc2c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.