Using COC(=O)c1cn(-c2cc(C(F)(F)F)nc3ccccc23)c2ccccc12 to produce O=C(O)c1cn(-c2cc(C(F)(F)F)nc3ccccc23)c2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.