COC(=O)c1ccc(NC(=O)CSc2nc3ccc(N4C(=O)C5C6C=CC(C6)C5C4=O)cc3s2)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?