Using [NH4+], CCN(CC)CC(C(C)C)N(Cc1cccc(Br)n1)C(=O)OC(C)(C)C to produce CCN(CC)CC(C(C)C)N(Cc1cccc(N)n1)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.