CC(C)(C)N1C(=O)[C@H]2CC[C@@H]3/C(=N\NC(=O)OCc4ccccc4)C[C@@H](O)[C@@H](O)[C@@H]3[C@@H]2C1=O
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.