CC[C@]1(C(=O)OC)[C@H]2C(=O)N(C)C(=O)[C@H]2[C@H]2CN=C(SCc3ccc(Cl)cc3)N21.O=C(O)C(F)(F)F
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.