CNc1ncnc(N)c1N    mol4148    0_1
CNc1ncnc([NH3+])c1N    mol4148    1_1
CNc1[nH+]cnc(N)c1N    mol4148    1_2
C[NH2+]c1ncnc(N)c1N    mol4148    1_3
CNc1ncnc(N)c1[NH3+]    mol4148    1_4
CNc1nc[nH+]c(N)c1N    mol4148    1_5