CNc1cnc2cncnc2n1 mol8210 0_1 C[NH2+]c1cnc2cncnc2n1 mol8210 1_1 CNc1cnc2c[nH+]cnc2n1 mol8210 1_2 CNc1cnc2cnc[nH+]c2n1 mol8210 1_3 CNc1c[nH+]c2cncnc2n1 mol8210 1_4 CNc1cnc2cncnc2[nH+]1 mol8210 1_5