CCN1C(=O)[C@H]2[C@@H](C1=O)[C@@H](c1ccc(C)cc1)N1C(=O)N(c3cccc(Cl)c3)C(=O)[C@@]21Cc1ccc(Cl)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.