Using O=C(c1ccccc1)c1ccc2nc(NC(=O)C(F)(F)F)c(-c3ccc(F)cc3F)n2c1 to produce Nc1nc2ccc(C(=O)c3ccccc3)cn2c1-c1ccc(F)cc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.