CC1(C)C2CC[C@]3(C)C(CC=C4[C@@H]5C[C@@](C)(CO)CC[C@]5(C(=O)O)CC[C@]43C)[C@@]2(C)CC[C@@H]1O
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?