Using COC(=O)Cc1cnc(Cc2ccc(NC(=O)c3ccc(Cl)c(Cl)c3)cc2)n2ccnc12 to produce O=C(O)Cc1cnc(Cc2ccc(NC(=O)c3ccc(Cl)c(Cl)c3)cc2)n2ccnc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.