NCc1nnnn1-c1ccccc1    mol25443    0_1
NCc1nn[nH+]n1-c1ccccc1    mol25443    1_1
NCc1[nH+]nnn1-c1ccccc1    mol25443    1_2
NCc1n[nH+]nn1-c1ccccc1    mol25443    1_3
[NH3+]Cc1nnnn1-c1ccccc1    mol25443    1_4