Nc1ccc(N=Nc2ccccc2)c(N)c1    mol5751    0_1
Nc1ccc(N=[NH+]c2ccccc2)c(N)c1    mol5751    1_1
Nc1ccc(N=Nc2ccccc2)c([NH3+])c1    mol5751    1_2
Nc1cc([NH3+])ccc1N=Nc1ccccc1    mol5751    1_3