CNc1nc(N)nc(N)n1    mol7625    0_1
C[NH2+]c1nc(N)nc(N)n1    mol7625    1_1
CNc1nc(N)nc([NH3+])n1    mol7625    1_2
CNc1nc(N)nc(N)[nH+]1    mol7625    1_3
CNc1nc(N)[nH+]c(N)n1    mol7625    1_4