Using [NH4+], CCC(C)(C)CC(=O)CNC(=O)C(Cc1ccc(Br)cc1)NC(=O)OCc1ccccc1 to produce CCC(C)(C)Cc1c[nH]c(C(Cc2ccc(Br)cc2)NC(=O)OCc2ccccc2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.