CC1(C)CC(=O)C2=C(C1)O[C@@]1(CCCCN3C(=O)c4ccccc4C3=O)Cc3ccccc3[C@@H]2O1
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?