Using [NH4+], N[C@@H](CCCCNC(c1ccccc1)(c1ccccc1)c1ccccc1)C(=O)O to produce NC(=O)[C@@H](N)CCCCNC(c1ccccc1)(c1ccccc1)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.