COC(=O)C1(C)C=CC(=O)C2(C)C1C(O)C1OC3CC(c4ccoc4)C(C)=C3C1(C)C2CC(=O)[O-].[Na+]
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?