CC(C)[C@@]12CC[C@@]3(CC[C@@H]4[C@@](C)(C(=O)O)CCC[C@@]4(C)[C@@H]3C1)[C@@H](CN)C2
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?