Using COC(=O)C(Cc1ccc(OCC(=O)OC(C)(C)C)cc1)OCc1ccc(F)cc1 to produce COC(=O)C(Cc1ccc(OCC(=O)O)cc1)OCc1ccc(F)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.