C[C@@H](C(=O)NCc1ccccn1)[C@H]1C[C@]1(C)[C@H](NC(=O)OCc1ccccc1)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?