CC(C)(C(=O)[O-])c1c[nH]c(CO)[nH+]1    mol13901    0_1
CC(C)(C(=O)O)c1c[nH]c(CO)n1    mol13901    0_2
CC(C)(C(=O)[O-])c1c[nH]c(CO)n1    mol13901    -1_1
CC(C)(C(=O)O)c1c[n-]c(CO)n1    mol13901    -1_2