O=C1/C(=C/c2ccc(OC(=O)c3ccc(Cl)cc3)cc2)CCC/C1=C\c1ccc(OC(=O)c2ccc(Cl)cc2)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?