O=C1C2C3C=CC(c4ccccc4)(C2C(=O)N1c1cccc(Cl)c1)C1C(=O)N(c2cccc(Cl)c2)C(=O)C31
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?