CC(C)[C@]1(NC(=O)[C@H]2C=C3c4cccc5[nH]cc(c45)C[C@H]3N(C)C2)O[C@@]2(O)[C@H]3CCCN3C(=O)[C@H](Cc3ccccc3)N2C1=O
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?