O=C1CN(C(=O)c2ccc(S(=O)(=O)N3CCCC3)cc2)C(c2ccccc2)c2cc(Br)ccc2N1
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?