CNc1ccc2oc(C[C@@H]3OC4(CC[C@@H]3C)O[C@H](C(C)C(=O)c3ccc[nH]3)[C@H](C)C[C@H]4C)nc2c1C(=O)O
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?