Using COC(=O)c1cc2c(cc1F)-c1noc(-c3onc(-c4ccccc4)c3C(F)(F)F)c1CC2 to produce O=C(O)c1cc2c(cc1F)-c1noc(-c3onc(-c4ccccc4)c3C(F)(F)F)c1CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.