CC1=CC2OC3CC4OC(=O)C=CC=CC(=O)OCCC(C)C(O)C(=O)OCC2(CC1)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?