O=C(Nc1ccc(O)cc1)c1ccc2c(c1)C(=O)N(N1C(=O)c3ccccc3C1=O)C2=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?