CN1NC=C(CO)N1N    mol25327    0_1
C[NH+]1NC=C(CO)N1N    mol25327    1_1
CN1NC=C(CO)[NH+]1N    mol25327    1_2
CN1NC=C(CO)N1[NH3+]    mol25327    1_3
CN1[NH2+]C=C(CO)N1N    mol25327    1_4