COC(=O)C1=C(C(=O)OC)[C@]2([C@H]3C/C=C\CN[C@@H](Cc4ccccc4)C(=O)N3Cc3ccccc3)C=C[C@H]1O2
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.