O=C(NCc1cc(C(F)(F)F)ccc1Cl)c1cccc2c1C(=O)c1ccc(N3CCC(N4CCCCC4)CC3)cc1S2(=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.