O=C(O)c1cc2cc(F)c(O)c(F)c2oc1=O    mol20717    0_1
O=C(O)c1cc2cc(F)c([O-])c(F)c2oc1=O    mol20717    -1_1
O=C([O-])c1cc2cc(F)c(O)c(F)c2oc1=O    mol20717    -1_2