C=C1C(=O)OC2/C=C(CO)/C=C\C3OC3(C)CC(OC(=O)/C(C)=C/COC(C)=O)C12
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?