Cc1csc(C(=O)O)n1    mol1625    0_1
Cc1csc(C(=O)[O-])[nH+]1    mol1625    0_2
Cc1csc(C(=O)O)[nH+]1    mol1625    1_1
Cc1csc(C(=O)[O-])n1    mol1625    -1_1