O=C(C[C@H]1C/C=C\CC[C@@H](Cc2ccc(F)cc2)C(=O)OC[C@H]2CCCN2C1=O)N[C@@H](CO)Cc1ccccc1
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.