Using Nc1cnn(Cc2ccc(Cl)cc2Cl)c1, O=C(O)c1c(Cl)cccc1Cl to produce O=C(Nc1cnn(Cc2ccc(Cl)cc2Cl)c1)c1c(Cl)cccc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.