CNc1nc(C)nc2nc[nH]c12    mol4902    0_1
CNc1[nH+]c(C)nc2nc[nH]c12    mol4902    1_1
CNc1nc(C)[nH+]c2nc[nH]c12    mol4902    1_2
CNc1nc(C)nc2[nH+]c[nH]c12    mol4902    1_3
C[NH2+]c1nc(C)nc2nc[nH]c12    mol4902    1_4