NC(=[NH2+])NOCC(=O)[O-]    mol8538    0_1
N=C(N)NOCC(=O)O    mol8538    0_2
NC(=[NH2+])NOCC(=O)O    mol8538    1_1
N=C(N)NOCC(=O)[O-]    mol8538    -1_1
[N-]=C(N)NOCC(=O)O    mol8538    -1_2