CCOC(=O)[C@]1(OC(C)=O)C[C@H](OC(C)=O)[C@@H](C(F)COP(=O)(OCc2ccccc2)OCc2ccccc2)O1
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.