COc1ccc([C@@H]2[C@@H]3C(=O)N(C(C)(C)C)C(=O)[C@@H]3[C@]3(Cc4ccccc4)C(=O)N(c4ccc(C(F)(F)F)cc4)C(=O)N23)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.