Using COC(=O)c1ccc(C2(NC(=O)c3cccc4c3N(Cc3ccc(Cl)c(Cl)c3)CC4)CC2)cc1 to produce O=C([O-])c1ccc(C2(NC(=O)c3cccc4c3N(Cc3ccc(Cl)c(Cl)c3)CC4)CC2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.