N[C@@H](CC[NH3+])C(=O)[O-]    mol8520    0_1
NCC[C@H]([NH3+])C(=O)[O-]    mol8520    0_2
NCC[C@H](N)C(=O)O    mol8520    0_3
N[C@@H](CC[NH3+])C(=O)O    mol8520    1_1
NCC[C@H]([NH3+])C(=O)O    mol8520    1_2
[NH3+]CC[C@H]([NH3+])C(=O)[O-]    mol8520    1_3
[NH3+]CC[C@H]([NH3+])C(=O)O    mol8520    2_1
NCC[C@H](N)C(=O)[O-]    mol8520    -1_1