Using [NH4+], CCC(C)(C)CC(=O)CNC(=O)CCc1ccc(Br)cc1 to produce CCC(C)(C)Cc1c[nH]c(CCc2ccc(Br)cc2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.