CCCCCCn1c(=O)n2n(c1=O)C[C@@]1(O)CN(S(=O)(=O)c3ccc(C)cc3)C[C@@]1(OC(=O)NCc1ccccc1F)C2
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.