(S)-2-Amino-3-methyl-N-(4-methylsulfanyl-benzyl)-butyramide

(S)-2-Amino-N-(2-chloro-benzyl)-N-ethyl-3-methyl-butyramide

(S)-2-Amino-N-(3-bromo-benzyl)-N-ethyl-3-methyl-butyramide

(S)-2-Amino-N-(3-bromo-benzyl)-N-isopropyl-3-methyl-butyramide

(S)-2-Amino-N-cyclopropyl-N-(3-fluoro-benzyl)-3-methyl-butyramide

(4-Cyano-benzylamino)-acetic acid

(4-Methylsulfanyl-benzylamino)-acetic acid

[(3-Chloro-benzyl)-ethyl-amino]-acetic acid

[Ethyl-(2-methyl-benzyl)-amino]-acetic acid

[(3-Chloro-benzyl)-isopropyl-amino]-acetic acid

[(4-Bromo-benzyl)-cyclopropyl-amino]-acetic acid