CC1(C)N=C(N)N=C(N)N1c1ccc(OCC(=O)Nc2cccc(S(=O)(=O)F)c2)c(Cl)c1.CCS(=O)(=O)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.