C[C@@H](CO)N1C[C@@H](C)[C@H](CN(C)Cc2ccc(Cl)c(Cl)c2)Oc2ccc(NC(=O)CCC(F)(F)F)cc2C1=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.