COC(=O)[C@@]1(Cc2ccccc2)[C@H]2C(=O)N(Cc3ccccc3)C(=O)[C@H]2[C@H]2CN=C(SCc3ccc(C)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.