1 C1R 4-piperidinebutyrate 1.000 2 CLT 4-phenyl-butanoic acid 0.769 3 N4B N-butylbenzene 0.750 4 YGM (but-3-en-1-yl)benzene 0.750 5 3FB (3s)-3-amino-4-phenylbutanoic acid 0.714 6 4R9 N-oxidanyl-4-phenyl-butanamide 0.714 7 HMF 2-amino-4-phenyl-butyric acid 0.714 8 HPE Homophenylalanine 0.714 9 Y9E 2-oxo-4-phenylbutanoic acid 0.714