Using COC(=O)c1ccc2ccnc(-c3c(F)cc(F)cc3F)c2c1 to produce O=C(O)c1ccc2ccnc(-c3c(F)cc(F)cc3F)c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.