NC(=O)c1cncnc1N    mol7009    0_1
NC(=O)c1cnc[nH+]c1N    mol7009    1_1
NC(=O)c1c[nH+]cnc1N    mol7009    1_2
NC(=O)c1cncnc1[NH3+]    mol7009    1_3