CC1=C(C(=O)Nc2ccccc2)C(c2cc(Br)ccc2F)n2ncc(C(=O)Nc3ccccc3)c2N1
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?