O=C(O)c1cncc(C(=O)O)c1C(=O)O    mol6590    0_1
O=C([O-])c1c[nH+]cc(C(=O)O)c1C(=O)O    mol6590    0_2
O=C(O)c1c[nH+]cc(C(=O)O)c1C(=O)[O-]    mol6590    0_3
O=C([O-])c1cncc(C(=O)[O-])c1C(=O)[O-]    mol6590    -3_1
O=C([O-])c1c[nH+]cc(C(=O)O)c1C(=O)[O-]    mol6590    -1_1
O=C(O)c1cncc(C(=O)O)c1C(=O)[O-]    mol6590    -1_2
O=C([O-])c1cncc(C(=O)O)c1C(=O)O    mol6590    -1_3
O=C([O-])c1c[nH+]cc(C(=O)[O-])c1C(=O)O    mol6590    -1_4
O=C([O-])c1c[nH+]cc(C(=O)[O-])c1C(=O)[O-]    mol6590    -2_1
O=C([O-])c1cncc(C(=O)[O-])c1C(=O)O    mol6590    -2_2
O=C([O-])c1cncc(C(=O)O)c1C(=O)[O-]    mol6590    -2_3