COc1ccc(CNC(=O)O[C@@H]2C[C@H]3C(=O)N(c4ccccc4)C(=O)[C@H]3[C@@]3(CN(S(=O)(=O)c4ccc(C)cc4)C[C@H]3C)[C@@H]2O)cc1OC
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.