COc1cccc(N2CCN(C(=O)c3cccc(N4C(=O)NC5CC4(C)Oc4c(OC)cccc45)c3)CC2)c1
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?