O=C(O)c1c(F)c(F)c(F)c(C(=O)O)c1F    mol23036    0_1
O=C([O-])c1c(F)c(F)c(F)c(C(=O)O)c1F    mol23036    -1_1
O=C([O-])c1c(F)c(F)c(F)c(C(=O)[O-])c1F    mol23036    -2_1