Using Nc1cc(F)ccc1F, CN1C(=O)C(F)(F)CN(C2CCCC2)c2nc(Cl)ncc21 to produce CN1C(=O)C(F)(F)CN(C2CCCC2)c2nc(Nc3cc(F)ccc3F)ncc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.