CC(C)[C@]1(Cl)CC[C@@H]2[C@]3(C)CCC[C@@](C)(C(=O)O)[C@H]3C[C@H](Cl)[C@@]2(Cl)[C@H]1Cl
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?