CNC(=N)c1nc[nH]c1N    mol37770    0_1
CNC(=N)c1[nH+]c[nH]c1N    mol37770    1_1
CNC(=[NH2+])c1nc[nH]c1N    mol37770    1_2
CNC(=N)c1nc[nH]c1[NH3+]    mol37770    1_3