COc1ccc2[nH]c3c4c(c5cc(C(C)(C)C)ccc5c3c2c1)C(=O)N(c1ccccc1)C4=O
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?