1 PRV (2r)-amino(2-nitrophenyl)ethanoic acid 1.000 2 004 (2s)-amino(phenyl)ethanoic acid 0.786 3 CHG Cyclohexyl-glycine 0.786 4 PG9 D-phenylglycine 0.786 5 D4P (2s)-amino(4-hydroxyphenyl)acetic acid 0.733 6 GHP (2r)-amino(4-hydroxyphenyl)ethanoic acid 0.733 7 GRN 2-phenyl-L-alanine 0.733 8 PAC 2-phenylacetic acid 0.714 9 PRQ (3s)-3-amino-3-(2-nitrophenyl)propanoic acid 0.706