1 KFJ 4-(4-nitrophenyl)-L-threonine 1.000 2 HMF 2-amino-4-phenyl-butyric acid 0.765 3 HPE Homophenylalanine 0.765 4 73O (2~{S})-2-azanyl-4-(4-hydroxyphenyl)butanoic acid 0.722 5 ACZ Cis-amiclenomycin 0.722 6 TZA Trans-amiclenomycin 0.722 7 CLT 4-phenyl-butanoic acid 0.706