Nc1ccc(Oc2ccc(C34CC5C6CC7(c8ccc(Oc9ccc(N)cc9)cc8)CC5C(C3)C(C7)C6C4)cc2)cc1
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?