C/C=C/[C@H]1[C@@H]2C(=O)[C@]3(Cl)[C@H](C(=O)[C@]12Cl)[C@H]3/C=C/C
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?