C=C(C)[C@@H]1CCC2=C[C@@H](OC2=O)[C@@H](C(=C)C)c2cc(C(=O)O)c(o2)C1
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?