O=C(C[C@H]1C/C=C\CC[C@H](Cc2ccc(F)cc2)C(=O)OC[C@@H]2CCCN2C1=O)N[C@H](CO)Cc1ccccc1
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?