Using CCC=C(CC(O)(C(=O)OCC)C(F)(F)F)c1cccc(F)c1OC to produce CCCC(CC(O)(C(=O)OCC)C(F)(F)F)c1cccc(F)c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.