NC(=O)C[C@@H]1NC(=O)c2cc([N+](=O)[O-])cc(F)c2NCCCC[C@@H](C(N)=O)NC(=O)[C@H](CO)NC1=O
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?