O=c1c(C(c2ccc(Cl)cc2)c2c(O)c3ccccc3n(-c3ccccc3)c2=O)c(O)c2ccccc2n1-c1ccccc1
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?