Using COC(=O)C(Cc1ccc(OCCCOc2ccc(-c3ccccc3)cc2)cc1F)OC to produce COC(Cc1ccc(OCCCOc2ccc(-c3ccccc3)cc2)cc1F)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.