Using COc1cc(Cl)nc2ccc(C)cc12, NCCCNCc1ccc(Cl)c(Cl)c1 to produce COc1cc(NCCCNCc2ccc(Cl)c(Cl)c2)nc2ccc(C)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.