Using O=C([O-])[O-], CC(C)(C)c1cc(Br)c2ncc(N3CCC(NS(C)(=O)=O)CC3)nc2c1 to produce CC(C)(C)c1cc(-c2ccc[nH]c2=O)c2ncc(N3CCC(NS(C)(=O)=O)CC3)nc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.