Using COC(=O)c1ccc(N(S(=O)(=O)C(F)(F)F)S(=O)(=O)C(F)(F)F)cc1Cl to produce O=C(O)c1ccc(NS(=O)(=O)C(F)(F)F)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.