Using COc1c(CC(C)(C#N)c2ccc(NS(C)(=O)=O)cc2)cc(Br)cc1C(C)(C)C, O=C([O-])[O-] to produce COc1c(CC(C)(C#N)c2ccc(NS(C)(=O)=O)cc2)cc(-c2ccc[nH]c2=O)cc1C(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.