C/C(=C/CC[C@](C)(OC1OC(CO)C(O)C(O)C1OC1OC(C)C(O)C(O)C1O)[C@H]1CC[C@]2(C)[C@@H]1CC[C@@H]1[C@@]3(C)CC[C@H](O)C(C)(C)[C@@H]3C[C@H](O)[C@]12C)CO
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?