O=C(Nc1cc(Cl)cc(Cl)c1)C1C2C=CC3(O2)C1C(=O)N(CCCN1CCOCC1)C3C(=O)NC1CCCCC1
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?