O=C1C(O)=C(Oc2ccccc2)C(=O)C(O)=C1Oc1ccccc1    mol1731    0_1
O=C1C(O)=C(Oc2ccccc2)C(=O)C([O-])=C1Oc1ccccc1    mol1731    -1_1