N#CCCN(C(=O)Nc1ccccc1)[C@H]1CCCC[C@@H]1N(C(=O)Nc1ccccc1)c1ccccc1
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?