Using O=C(CNC(=O)[C@@H]1COC2(CCOCC2)N1C(=O)OCc1ccccc1)c1ccc(Br)cc1, [NH4+] to produce O=C(OCc1ccccc1)N1[C@H](c2nc(-c3ccc(Br)cc3)c[nH]2)COC12CCOCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.