Using N=C(N)COCCc1ccc2ccccc2c1, O=C(O)c1cc(Cl)cnc1Cl to produce N=C(COCCc1ccc2ccccc2c1)NC(=O)c1cc(Cl)cnc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.