CC[C@H]1C2=C3C(CC[C@H]4C(OCc5ccc(F)cc5C(F)(F)F)OC[C@](C)([C@@H]34)N(C(=O)OC(C)(C)C)C2)C(COC)C1COC
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.