CC1(CC(=O)[O-])N=[NH+]1    mol9184    0_1
CC1(CC(=O)O)N=N1    mol9184    0_2
CC1(CC(=O)O)N=[NH+]1    mol9184    1_1
CC1(CC(=O)[O-])[NH+]=[NH+]1    mol9184    1_2