CC(=O)OCC1=C(C(=O)O)N2C(=O)C(NC(=O)c3ccc(COc4cccc(Cl)c4Cl)o3)C2SC1
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?