CC(=O)OCC1OC(N2C(C)=C(C(C)=O)C(c3ccco3)C(C#N)=C2S)C(OC(C)=O)C(OC(C)=O)C1OC(C)=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?