CC(=O)OCC(=O)[C@@]12OC(C)(C)OC1CC1C3CC(F)C4=CC(=O)C=C[C@@]4(C)[C@@]3(F)C(O)C[C@]12C
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?