CN1C(=O)C2(C(C#N)=C(N)N(c3ccc(Cl)cc3)C3=C2C(=O)CC(C)(C)C3)c2ccccc21
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?