C[C@H]1CN([C@@H](C)CO)C(=O)Cc2cc(NC(=O)CCC(F)(F)F)ccc2O[C@H]1CN(C)S(=O)(=O)c1ccc(F)cc1
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.