C=C1C(=O)O[C@H]2/C=C(/C)C3=CC(=O)[C@@](C)(C[C@@H](OC(=O)/C(C)=C\C)C12)O3
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?