NCCC[C@H]1NC(=O)NC1=O    mol9801    0_1
[NH3+]CCC[C@H]1NC(=O)NC1=O    mol9801    1_1
NCCC[C@H]1NC(=O)[N-]C1=O    mol9801    -1_1
NCCC[C@H]1[N-]C(=O)NC1=O    mol9801    -1_2