O=C1C([P+](c2ccccc2)(c2ccccc2)c2ccccc2)=C([O-])C(=Cc2ccc(Cl)c(Cl)c2)C([O-])=C1[P+](c1ccccc1)(c1ccccc1)c1ccccc1
Molecules with a polar surface area of greater than 60 angstroms squared (Å2) is hard to pass brain blood barrier. What's the psa of this molecule?