CC(OC(C)(C)C)[C@H](NC(=O)OCc1ccccc1)C(=O)NC(OCc1ccccc1)[C@H]1COC(C)(C)O1
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?