Using COCn1ccnc1, O=C(c1ccc(C(F)(F)F)cc1)c1ccc(C(F)(F)F)cc1 to produce COCn1ccnc1C(O)(c1ccc(C(F)(F)F)cc1)c1ccc(C(F)(F)F)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.