C=C(C(=O)O)[C@@H]1C[C@@H]2O[C@H]1C/C(C)=C\CC/C(C)=C/CC[C@@]2(C)O
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?