Using NC(=O)c1ccnc(N)c1, O=C(O)COc1cc(Cl)c(Cl)cc1Cl to produce NC(=O)c1ccnc(NC(=O)COc2cc(Cl)c(Cl)cc2Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.