NC(=O)[C@@H]1CC2(CC(c3cccc(NC(=O)[C@@H]4CCC(=O)N4)c3)=NO2)CN1C(=O)Cc1ccc([N+](=O)[O-])cc1
PSA is a commonly used medicinal chemistry metric for the optimization of a drug's ability to permeate cells. Please predict psa of this molecule.