CNc1ccn(C)c(=N)n1    mol7345    0_1
CNc1ccn(C)c(=[NH2+])n1    mol7345    1_1
C[NH2+]c1ccn(C)c(=N)n1    mol7345    1_2
CNc1ccn(C)c(=N)[nH+]1    mol7345    1_3