O=C(C1CCCN(S(=O)(=O)c2cccc3nonc23)C1)N1CCN(c2cccc(C(F)(F)F)c2)CC1
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?