Using CCOC(=O)C1(CCCCOc2cccc(C(F)(F)F)c2)CO1 to produce O=C([O-])C1(CCCCOc2cccc(C(F)(F)F)c2)CO1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.