O=C(CC(=O)n1nc(-c2ccccc2)c(/N=N/c2ccccc2C(=O)O)c1-c1ccccc1)Nc1ccc(Cl)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?