CC1(C)[C@H]2CC[C@@]13C(=O)N1C(=O)O[C@@H]([C@H]1Cl)C(Cl)(COCc1ccccc1)C(=O)OCCO[C@H]3C2
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.