Using CCOC(=O)CNc1nc(Cl)ccc1NC(=O)c1ccc(Cl)cc1 to produce O=C(O)Cn1c(-c2ccc(Cl)cc2)nc2ccc(Cl)nc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.