COC(=O)C1=C(c2cccc(OCc3ccccc3)c2)C[C@@H]2CC[C@H]1N2C(=O)NCCCc1ccccc1
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?