Using Nc1cccnc1, O=C(O)c1cccc2c(=O)cc(-c3cccc(C(F)(F)F)c3)oc12 to produce O=C(Nc1cccnc1)c1cccc2c(=O)cc(-c3cccc(C(F)(F)F)c3)oc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.