CO[C@@H]1COC(=O)[C@H](Cc2ccccc2)NC(=O)C/C=C\[C@@H](C)[C@H](OC)COC(=O)[C@@H](C)NC(=O)C/C=C\[C@H]1C
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.