CCOC(=O)C(C)(NC(=O)c1ccc(NCc2ccc3nc(NC(=O)c4ccccc4)nc(NC(=O)c4ccccc4)c3c2)cc1)C(=O)OCC
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?