O=C(O)c1cc(-c2ccc(-c3ccc(-c4cc(C(=O)O)c5cc(Cl)ccc5n4)cc3)cc2)nc2ccc(Cl)cc12
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?