Using FC1(F)CCCNC1, Fc1cc2nc(Cl)c(-c3nnn[nH]3)c(-c3ccccc3)c2cc1Cl to produce Fc1cc2nc(N3CCCC(F)(F)C3)c(-c3nn[nH]n3)c(-c3ccccc3)c2cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.