CNc1nccnc1C(N)=O    mol3981    0_1
CNc1ncc[nH+]c1C(N)=O    mol3981    1_1
C[NH2+]c1nccnc1C(N)=O    mol3981    1_2
CNc1[nH+]ccnc1C(N)=O    mol3981    1_3