O=C(CSc1nc(O)c2cnn(-c3ccc(F)cc3)c2n1)N1N=C(c2cccs2)CC1c1ccc(F)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?