Using CCOC(=O)CNc1ncccc1NC(=O)c1ccc(Cl)c(Cl)c1 to produce O=C(O)Cn1c(-c2ccc(Cl)c(Cl)c2)nc2cccnc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.