CCC[C@@H]1CC2=CC(=O)CC[C@]2(C)[C@@H]2CC[C@@]3(C)[C@H](CC[C@]3(O)CCC(=O)[O-])[C@H]12.[K+]
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?