CCOC(=O)c1cccc(C2=C(CNC(=O)c3ccc([N+](=O)[O-])cc3)[C@H]3CC[C@@H](C2)N3Cc2ccccc2)c1
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.