CCOc1cc(N2CCOCC2)c(OCC)cc1NC(=O)COC(=O)[C@H](Cc1c[nH]c2ccccc12)NC(C)=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?