C[n+]1cnc2nc[n-]c2c1O    mol13990    0_1
C[n+]1cnc2nc[nH]c2c1[O-]    mol13990    0_2
C[n+]1cnc2nc[nH]c2c1O    mol13990    1_1
C[n+]1cnc2[nH+]c[nH]c2c1[O-]    mol13990    1_2
C[n+]1c[nH+]c2nc[nH]c2c1[O-]    mol13990    1_3