COC1/C=C\C=C(/C)C(=O)NC2=CC(=O)C(O)=C(CC(C)CC(OC)C(O)C(C)/C=C(\C)C1OC(N)=O)C2=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?