O=C(CCc1ccccc1)N[C@@H]1c2c(n(S(=O)(=O)c3ccccc3)c3ccccc23)C[C@H]1OCc1ccccc1
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?