CC[NH2+][C@@H](C)C(=O)[O-]    mol12490    0_1
CCN[C@@H](C)C(=O)O    mol12490    0_2
CC[NH2+][C@@H](C)C(=O)O    mol12490    1_1
CCN[C@@H](C)C(=O)[O-]    mol12490    -1_1