Cc1cc(N)nc(N)n1    mol4147    0_1
Cc1cc([NH3+])nc(N)n1    mol4147    1_1
Cc1cc(N)nc([NH3+])n1    mol4147    1_2
Cc1cc(N)[nH+]c(N)n1    mol4147    1_3
Cc1cc(N)nc(N)[nH+]1    mol4147    1_4