CN(C)CCC(=O)[C@@]1(O)CC[C@H]2[C@H]3CC=C4C[C@@H](O)CC[C@]4(C)[C@H]3CC[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?