CCN1C(C)=C(C(=O)OC)C(c2ccccc2)N2C(=O)[C@](O)(C(=O)OC)C(c3ccccc3)C(C(=O)c3ccccc3)=C12
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.