Cc1ccc(OCc2cc(C(=O)N3C[C@@H]4C[C@H]5C[C@H]3C[C@H](C5)C4)no2)cc1C
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?