CC1(C)[C@@H]2C[C@H]1[C@H](C(O)[C@@H]1c3cc(-c4ccccn4)ncc3[C@@H]3C[C@H]1C3(C)C)c1cc(-c3ccccn3)ncc12
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.