COc1ccc(C2c3[nH]c4ccccc4c3C[C@H]3C(=O)N(C4CCN(Cc5ccccc5)CC4)CC(=O)N23)c(OC)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?