O=C1NCCOC(=O)[C@@H](Cc2ccc(F)cc2)CC/C=C/C[C@@H]1CC(=O)N(CCO)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?