Using OC1(c2ncccn2)CC2CCC(C1)N2, Clc1ccccc1C(Br)c1ccccc1Cl to produce OC1(c2ncccn2)CC2CCC(C1)N2C(c1ccccc1Cl)c1ccccc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.