N=C1NCCNC(=N)N1    mol28013    0_1
N=C1NCCNC(=[NH2+])N1    mol28013    1_1
[NH2+]=C1NCCNC(=[NH2+])N1    mol28013    2_1
N=C1[N-]C(=N)NCCN1    mol28013    -1_1
N=C1[N-]CCNC(=N)N1    mol28013    -1_2
[N-]=C1NCCNC(=N)N1    mol28013    -1_3