O=C(Nc1ccc(Cl)cc1)[C@@H]1[C@@H]2C(=O)N(c3cccc(F)c3)C(=O)[C@@H]2[C@H]2C=CC=NN12
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.