Using COC(=O)COc1cccc(OC2CCc3ccc(-c4cccc(F)c4)cc32)c1 to produce O=C(O)COc1cccc(OC2CCc3ccc(-c4cccc(F)c4)cc32)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.