Using Clc1nc(Cl)c2[nH]cnc2n1, O=C(c1ccc(Cl)cc1)c1ccc(CBr)cc1 to produce O=C(c1ccc(Cl)cc1)c1ccc(Cn2cnc3nc(Cl)nc(Cl)c32)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.