CCCCCCCCCC1CC(=O)NCC(=O)NC(C(C)C)C(=O)NC(CC(C)C)C(=O)NC(C)C(=O)NC(C(C)C)C(=O)O1
Molecules with a polar surface area of greater than 60 angstroms squared (Å2) is hard to pass brain blood barrier. What's the psa of this molecule?