COC(=O)C1(NC(=O)C(Cc2ccccc2)N(C(=O)OC(C)(C)C)C(=O)OC(C)(C)C)CCCC1
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?