Using Cc1ccc2nc(N3CCS(=O)(=O)c4ccccc4C3)cc(NC(=O)CC(N)C(F)(F)F)c2c1 to produce Cc1ccc2nc(N3CCS(=O)(=O)c4ccccc4C3)cc(NCCC(N)C(F)(F)F)c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.