Using CCCc1[nH]c2cc(C(=O)O)ccc2c1C(=O)C(C)C, OCc1ccccc1 to produce CCCc1[nH]c2cc(C(=O)OCc3ccccc3)ccc2c1C(=O)C(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.