O=C1OC[C@H]2CCCN2C(=O)[C@@H](CC(=O)N(CCO)Cc2ccccc2)C/C=C\C[C@H]1Cc1ccc(F)cc1
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?