C=CCN1C[C@H](C)N([C@H](c2ccc(C(=O)N(CC)CCO)cc2)c2cccc(OC)c2)C[C@H]1C
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?