Atomic structure
There is only one chemically distinct structure:
CC(=O)N[C@@H](CCC(N)=O)C(=O)N[C@H](Cc1ccccc1)C(=O)N[C@@H](Cc1c[nH]cn1)C(=O)N1CCC[C@@H]1C(=O)NC(C)C(=O)O