Using Clc1ccc(-c2nc3cccnc3[nH]2)cc1, O=C(CBr)c1ccccc1 to produce O=C(Cn1c(-c2ccc(Cl)cc2)nc2ncccc21)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.