O=C1[C@H]2[C@@H](C(=O)N1c1ccccc1)[C@@H](C1CC1)N1C(=O)CN(Cc3ccccn3)C(=O)[C@@]21Cc1ccccc1
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.