Using COCCn1cccc1C(O)c1ccc(N(C)S(=O)(=O)c2ccccc2)cc1 to produce COCCn1cccc1Cc1ccc(N(C)S(=O)(=O)c2ccccc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.