COC(=O)[C@]1(CC(C)C)N[C@H](c2ccc(-c3ccc4c(c3)OCO4)cc2)[C@@H]2C(=O)N(C)C(=O)[C@@H]21.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?