Using Cc1c[nH]c(=O)[nH]1, O=C(Cl)c1ccc2c(c1)OCO2 to produce Cc1[nH]c(=O)[nH]c1C(=O)c1ccc2c(c1)OCO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.