C[C@H](ON)C(=O)O    mol8500    0_1
C[C@H](O[NH3+])C(=O)[O-]    mol8500    0_2
C[C@H](O[NH3+])C(=O)O    mol8500    1_1
C[C@H](ON)C(=O)[O-]    mol8500    -1_1