Using COC(=O)c1ccc2[nH]c(C)c(C(=O)c3ccc(Cl)cc3Cl)c2c1 to produce Cc1[nH]c2ccc(C(=O)O)cc2c1C(=O)c1ccc(Cl)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.