C[C@H]1COC(=O)[C@H](CC(=O)OC(C)(C)C)C/C=C\C[C@@H](CC(=O)N(CCO)Cc2ccccc2)C(=O)N1
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.