COC(=O)C1=C(OC(=O)c2ccccc2)C(C(=O)OC)[C@]2(O)[C@@H](C(=O)OC)[C@H]1C[C@@H](c1ccccc1)[C@@H]2C(=O)OC
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.