CCN1C(=O)[C@@H]2[C@@H](c3ccc(-c4ccc(F)cc4)c(OC)c3)N3CCCC[C@@]3(C(=O)OC)[C@@H]2C1=O.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.