Cn1c(=O)c(C(=O)COC(=O)c2cc(C(F)(F)F)nc3c(C(F)(F)F)cccc23)c(N)n(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.