C[NH2+]c1ccccc1C(=O)[O-]    mol5256    0_1
CNc1ccccc1C(=O)O    mol5256    0_2
C[NH2+]c1ccccc1C(=O)O    mol5256    1_1
CNc1ccccc1C(=O)[O-]    mol5256    -1_1