Cn1cnc(=N)c2nccnc21    mol4776    0_1
Cn1cnc(=N)c2ncc[nH+]c21    mol4776    1_1
Cn1c[nH+]c(=N)c2nccnc21    mol4776    1_2
Cn1cnc(=[NH2+])c2nccnc21    mol4776    1_3
Cn1cnc(=N)c2[nH+]ccnc21    mol4776    1_4