Using Nc1nc2c(-c3ccc(F)c(F)c3)cc(C(F)(F)F)cn2n1 to produce Nc1nc2n(n1)CC(C(F)(F)F)CC2c1ccc(F)c(F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.