COC(=O)C1=C(C)N(c2ccc(C)cc2)/C(=C/c2ccc(CNC(=O)C(=O)Nc3ccccc3)o2)C1=O
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?