Nc1ncc(-c2ccccc2Br)c(N)n1    mol7253    0_1
Nc1ncc(-c2ccccc2Br)c(N)[nH+]1    mol7253    1_1
Nc1nc([NH3+])ncc1-c1ccccc1Br    mol7253    1_2
Nc1nc(N)c(-c2ccccc2Br)c[nH+]1    mol7253    1_3
Nc1ncc(-c2ccccc2Br)c([NH3+])n1    mol7253    1_4