Nn1cnc2ncnc(O)c21    mol29506    0_1
Nn1c[nH+]c2ncnc([O-])c21    mol29506    0_2
Nn1cnc2[nH+]cnc([O-])c21    mol29506    0_3
[NH3+]n1cnc2ncnc([O-])c21    mol29506    0_4
Nn1cnc2ncnc([O-])c21    mol29506    -1_1
[NH-]n1cnc2ncnc(O)c21    mol29506    -1_2