O=C(C[C@H]1C/C=C\C[C@H](NC(=O)OCC2c3ccccc3-c3ccccc32)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.