C=C(C)C(COc1c2occc2cc2ccc(=O)oc12)OC(C)(C)C(O)COc1c2occc2cc2ccc(=O)oc12
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?