CNc1nnc(-c2ccccc2)s1    mol4253    0_1
C[NH2+]c1nnc(-c2ccccc2)s1    mol4253    1_1
CNc1[nH+]nc(-c2ccccc2)s1    mol4253    1_2
CNc1n[nH+]c(-c2ccccc2)s1    mol4253    1_3