CC(C)(C)OC(=O)N1CCC(NC(=O)c2[nH]cnc2C(=O)N[C@@H](Cc2ccccc2)C(=O)OCc2ccccc2)CC1
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?