CC(C)(C)c1nc(N)ncc1Br    mol1606    0_1
CC(C)(C)c1nc([NH3+])ncc1Br    mol1606    1_1
CC(C)(C)c1nc(N)[nH+]cc1Br    mol1606    1_2
CC(C)(C)c1[nH+]c(N)ncc1Br    mol1606    1_3