Using O=C(Cl)OCc1ccccc1, COC(=O)c1[nH]c(C(C)(C)C)cc1N to produce COC(=O)c1[nH]c(C(C)(C)C)cc1C(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.