Using COC(=O)N[C@H](C(=O)N1CC2(CCOCC2)CC1C(=O)NCC(=O)c1ccc(Br)cc1)C(C)C, [NH4+] to produce COC(=O)N[C@H](C(=O)N1CC2(CCOCC2)CC1c1ncc(-c2ccc(Br)cc2)[nH]1)C(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.