Using COC(=O)c1ccc2c(c1)-n1nc(-c3ncnn3CC(F)(F)F)cc1CCO2 to produce O=C(O)c1ccc2c(c1)-n1nc(-c3ncnn3CC(F)(F)F)cc1CCO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.