N#[N+]c1[nH]nn[nH+]1    mol25233    2_1
N#[N+]c1n[nH+]n[nH]1    mol25233    2_2
N#[N+]c1nn[nH+][nH]1    mol25233    2_3
N#[N+]c1[nH]n[nH+][nH+]1    mol25233    3_1
N#[N+]c1n[nH+][nH+][nH]1    mol25233    3_2
N#[N+]c1[nH][nH+]n[nH+]1    mol25233    3_3