Nc1ccc2nc3ccccc3nc2c1    mol5121    0_1
[NH3+]c1ccc2nc3ccccc3nc2c1    mol5121    1_1
Nc1ccc2[nH+]c3ccccc3nc2c1    mol5121    1_2
Nc1ccc2nc3ccccc3[nH+]c2c1    mol5121    1_3