CC[C@@H](ON)C(=O)O    mol8494    0_1
CC[C@@H](O[NH3+])C(=O)[O-]    mol8494    0_2
CC[C@@H](O[NH3+])C(=O)O    mol8494    1_1
CC[C@@H](ON)C(=O)[O-]    mol8494    -1_1