Using CCOP(=O)(OCC)C(F)(F)C(=O)c1ccc(-c2ccc(F)cn2)c(F)c1F to produce O=C(c1ccc(-c2ccc(F)cn2)c(F)c1F)C(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.