CCOC(=O)[C@@H]1C2C(=C[C@H]3[C@H]1C(=O)N1CCCC[C@H]31)CCCN2C(=O)OCc1ccccc1
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?