Cn1cnc(/N=N/[O-])[nH+]1    mol13675    0_1
Cn1c[nH+]c(/N=N/[O-])n1    mol13675    0_2
Cn1cnc(/N=N/O)n1    mol13675    0_3
Cn1cnc(/N=N/[O-])n1    mol13675    -1_1