O=C(O)c1cccc(Br)c1C(=O)O    mol10489    0_1
O=C(O)c1cccc(Br)c1C(=O)[O-]    mol10489    -1_1
O=C([O-])c1cccc(Br)c1C(=O)O    mol10489    -1_2
O=C([O-])c1cccc(Br)c1C(=O)[O-]    mol10489    -2_1