O=C(O)c1c(F)c(F)c(-c2c(F)c(F)c(F)c(F)c2F)c(F)c1F    mol811    0_1
O=C([O-])c1c(F)c(F)c(-c2c(F)c(F)c(F)c(F)c2F)c(F)c1F    mol811    -1_1