CC1(C)CC(=O)C2=C(C1)N(CCN1CCOCC1)C1=C(C(=O)CC(C)(C)C1)C2c1ccc(Cl)c([N+](=O)[O-])c1
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.