COC(=O)[C@@]1(Cc2ccccc2)[C@H]2c3cc(C(=O)N4CCCC4)n(CCc4ccccn4)c3C[C@H]2CN1C(=O)c1ccccc1
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?