COC(=O)c1c(OC)cc2cc3c(c(O)c2c1C)C(=O)C1(O)C(=O)C=C(OC)C(OC(=O)CC(C)N)=C1C3=O.Cl
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?