Using Cc1nn(C)c2c1C(c1ccc(Cl)cc1Cl)SC(C)(C)CN2, O=C(OO)c1cccc(Cl)c1 to produce Cc1nn(C)c2c1C(c1ccc(Cl)cc1Cl)S(=O)C(C)(C)CN2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.