1.13.12.9 0.017 - 3-phenylpropanoate - 1.13.12.9 0.056 - 4-phenyl-n-butyrate - 1.13.12.9 0.098 - phenylacetic acid - 1.13.12.9 0.87 - 2-amino benzoate 20 mM Tris-HCl, pH 8.0, 25°C 1.13.12.9 0.93 - 5-phenylpentanoate - 1.13.12.9 7.1 - D-Phe -