Cc1ncc(C)c(N)n1    mol19244    0_1
Cc1ncc(C)c([NH3+])n1    mol19244    1_1
Cc1ncc(C)c(N)[nH+]1    mol19244    1_2
Cc1nc(N)c(C)c[nH+]1    mol19244    1_3