Using O=C([O-])[O-], COC(=O)CC/C(C)=C/Cc1c(NC(=O)C(F)(F)F)c2c(c(C)c1OC)COC2=O to produce COC(=O)CC/C(C)=C/Cc1c(OC)c(C)c2c(c1N(C)C(=O)C(F)(F)F)C(=O)OC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.