Using COC(=O)CC(=O)Nc1c(Cl)cc(Cl)cc1C(=O)c1ccccc1 to produce COC(=O)c1c(-c2ccccc2)c2cc(Cl)cc(Cl)c2[nH]c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.