O=C([O-])CN1CCOCCN(CC(=O)O)CCOCC1    mol38319    -1_1
O=C([O-])CN1CCOCC[NH+](CC(=O)[O-])CCOCC1    mol38319    -1_2
O=C([O-])CN1CCOCCN(CC(=O)[O-])CCOCC1    mol38319    -2_1