Using CCOC(=O)c1cncc2[nH]c(-c3ccccc3C(F)(F)F)nc12 to produce O=C(O)c1cncc2[nH]c(-c3ccccc3C(F)(F)F)nc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.