C1=Nc2[nH]nnc2CN1    mol8347    0_1
C1=Nc2[nH]n[nH+]c2CN1    mol8347    1_1
C1=Nc2[nH][nH+]nc2CN1    mol8347    1_2
C1=[NH+]c2[nH]nnc2CN1    mol8347    1_3
C1=Nc2[n-]nnc2CN1    mol8347    -1_1