Using CN(NC(=O)c1cc2c(NC(=O)c3ccc(Br)cc3)nn(C(=O)OC(C)(C)C)c2s1)c1ccccc1 to produce CN(NC(=O)c1cc2c(NC(=O)c3ccc(Br)cc3)n[nH]c2s1)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.