O=C([O-])CC(C(=O)[O-])C(=O)[O-]    mol36001    -3_1
O=C(O)C[C-](C(=O)[O-])C(=O)[O-]    mol36001    -3_2
O=C([O-])C[C-](C(=O)[O-])C(=O)O    mol36001    -3_3
O=C(O)CC(C(=O)[O-])C(=O)[O-]    mol36001    -2_1
O=C([O-])C[C-](C(=O)O)C(=O)O    mol36001    -2_2
O=C([O-])CC(C(=O)[O-])C(=O)O    mol36001    -2_3
O=C(O)C[C-](C(=O)[O-])C(=O)O    mol36001    -2_4