CC1(C)[C@@H]2C[C@H]1[C@@H](Cc1cccc(C[C@H]3c4cc(-c5ccccn5)ncc4[C@H]4C[C@@H]3C4(C)C)c1)c1cc(-c3ccccn3)ncc12
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?