C=C1CC[C@@H](O)C/C1=C/C=C1\CCC[C@]2(C)[C@@H]1CC[C@H]2[C@@H](C)CCCC(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?