Nc1cc2nccnc2cn1    mol8021    0_1
Nc1cc2nccnc2c[nH+]1    mol8021    1_1
[NH3+]c1cc2nccnc2cn1    mol8021    1_2
Nc1cc2ncc[nH+]c2cn1    mol8021    1_3
Nc1cc2[nH+]ccnc2cn1    mol8021    1_4