COC(=O)[C@@H](N)CN    mol8523    0_1
COC(=O)[C@@H](N)C[NH3+]    mol8523    1_1
COC(=O)[C@@H]([NH3+])CN    mol8523    1_2
COC(=O)[C@@H]([NH3+])C[NH3+]    mol8523    2_1