C=C1C(O)C2OC3(CCC(/C=C/C(C)C4CC(C)=CC5(OC(CC(C)(O)C(=O)O)CCC5O)O4)O3)CCC2OC1C(O)CC(C)C1OC2(CCCCO2)CCC1C
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?