Using O=C(CCc1c(Br)cc(Br)nc1-c1ccccc1Cl)Nc1ccccc1Cl to produce O=C1CCc2c(cc(Br)nc2-c2ccccc2Cl)N1c1ccccc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.