CC(=O)O[C@@]1(C(C)=O)CCC2C3C=C(Cl)C4=CC(=O)C5CC5[C@@]4(C)C3CC[C@]21C
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?