COc1cc2c(=O)n(Cc3ccccc3)c(=O)n(CC(=O)Nc3cc(C(F)(F)F)ccc3Cl)c2cc1OC
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?