Using C[C@H]1CN(Cc2cn(S(=O)(=O)c3ccccc3)c(=O)c3ccc(Br)cc23)CCN1C(=O)OC(C)(C)C to produce C[C@H]1CN(Cc2c[nH]c(=O)c3ccc(Br)cc23)CCN1C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.