CC1(C)Oc2ccccc2N2O[C@@H]3C(=O)N(c4ccccc4)C(=O)[C@@H]3C21c1ccccc1
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?