Using CNC(=O)C(F)(F)CN1c2ccccc2N(c2ccccc2F)S1(=O)=O to produce CNCC(F)(F)CN1c2ccccc2N(c2ccccc2F)S1(=O)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.