Nc1ccc2[nH]ncc2c1    mol4581    0_1
[NH3+]c1ccc2[nH]ncc2c1    mol4581    1_1
Nc1ccc2[nH][nH+]cc2c1    mol4581    1_2
Nc1ccc2[n-]ncc2c1    mol4581    -1_1