Cn1nnc(CC(=O)[O-])[nH+]1    mol12953    0_1
Cn1nc(CC(=O)[O-])n[nH+]1    mol12953    0_2
Cn1n[nH+]c(CC(=O)[O-])n1    mol12953    0_3
Cn1nnc(CC(=O)O)n1    mol12953    0_4
Cn1nnc(CC(=O)[O-])n1    mol12953    -1_1