CC1=CC2OC3CC4OC(=O)/C=C\C=CC(C(C)O)OCC(O)C(C)CC(=O)OCC2(CC1O)C4(C)C31CO1
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?