COc1cc(OC)cc(C(=O)N[C@H](C(=O)OCC(=O)Nc2ccc(C(N)=O)cc2)C(C)C)c1
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?