C[C@H](N)C(=O)N[C@H](C(=O)N1CCC[C@H]1C(=O)OCc1ccccc1)C1CCCCC1.O=C(O)C(F)(F)F
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?