C/C=C/C=C/C(=O)C1=C(O)[C@]2(C)C(=O)C(C)(O)[C@H]1[C@H]([C@]1(C)OC(O)=C(C)C1=O)[C@H]2C(=O)/C=C/C=C/C
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?