CNc1ncnc2c1ncn2C    mol8321    0_1
CNc1ncnc2c1[nH+]cn2C    mol8321    1_1
C[NH2+]c1ncnc2c1ncn2C    mol8321    1_2
CNc1nc[nH+]c2c1ncn2C    mol8321    1_3
CNc1[nH+]cnc2c1ncn2C    mol8321    1_4