CSc1nc2cncnc2n1C    mol4903    0_1
CSc1nc2cnc[nH+]c2n1C    mol4903    1_1
CSc1nc2c[nH+]cnc2n1C    mol4903    1_2
CSc1[nH+]c2cncnc2n1C    mol4903    1_3