NC(=O)CC1NC(=O)c2cc([N+](=O)[O-])cc(I)c2OCCC(C(N)=O)NC(=O)[C@@H]2CCCN2C1=O
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?