Using CC(C)(C)OC(=O)NCCNS(=O)(=O)c1c(C(N)=O)[nH]c2ccc(Br)cc12 to produce NCCNS(=O)(=O)c1c(C(N)=O)[nH]c2ccc(Br)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.