CC[C@@]1(C(=O)OC)N[C@H](CN(C)S(=O)(=O)c2ccc(C(C)(C)C)cc2)[C@@H]2C(=O)N(C)C(=O)[C@@H]21.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.