CCCCN1CC(=O)N2[C@H](c3ccc(OC)cc3)[C@@H]3C(=O)N(CC)C(=O)[C@@H]3[C@]2(Cc2ccccc2)C1=O
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.