Using COC(=O)c1c(OC(C)=O)cnc2c1C(F)(F)C(=O)C=C2 to produce COC(=O)c1c(OC(C)=O)cnc2ccc(O)c(F)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.