Nc1ncc(NC=O)c(N)n1    mol7291    0_1
Nc1nc(N)c(NC=O)c[nH+]1    mol7291    1_1
Nc1ncc(NC=O)c([NH3+])n1    mol7291    1_2
Nc1ncc(NC=O)c(N)[nH+]1    mol7291    1_3
Nc1nc([NH3+])ncc1NC=O    mol7291    1_4