O=C([O-])c1c[nH][nH+]n1    mol9003    0_1
O=C(O)c1c[nH]nn1    mol9003    0_2
O=C([O-])c1c[nH]n[nH+]1    mol9003    0_3
O=C([O-])c1c[nH]nn1    mol9003    -1_1
O=C(O)c1c[n-]nn1    mol9003    -1_2
O=C([O-])c1c[n-]nn1    mol9003    -2_1