CC(=O)OCC(=O)[C@]1(O)C(C)CC2C3CCC4=CC(=O)C=C[C@@]4(C)[C@]3(F)C(O)C[C@@]21C
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?