Using Cn1ncc(C(=O)N2CCC2)c1C(=O)Nc1ccn2nc(C(=O)O)nc2c1, NCCC(F)(F)F to produce Cn1ncc(C(=O)N2CCC2)c1C(=O)Nc1ccn2nc(C(=O)NCCC(F)(F)F)nc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.