Using CI, COCCn1cccc1C(O)(c1ccc(N(C)S(=O)(=O)c2ccccc2)cc1)C(F)(F)F to produce COCCn1cccc1C(OC)(c1ccc(N(C)S(=O)(=O)c2ccccc2)cc1)C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.