C=C1C(=O)[C@]23C[C@H]1CCC2[C@]1(C)CCC[C@@](C)(C(=O)O)C1C[C@@H]3O
Molecules with a polar surface area of greater than 140 angstroms squared (Å2) tend to be poor at permeating cell membranes. What's the psa of this molecule?