NC(Cc1ccccc1)C(=O)NC(Cc1ccccc1)NC(=O)C(Cc1c[nH]c2ccccc12)C(=O)O.O=C(O)C(F)(F)F
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.